CEETA-PG - Common Engineering Entrance Test and Admission

Anna University, Chennai

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Shalisha Ladawn PHYSICS   -   Classical Mechanics

Electric displacement current through a surface S is by definition proportional to the

Shalisha Ladawn PHYSICS   -   Classical Mechanics

Classical mechanics explains how _______ moves.

Tamoban Javnoi COMPUTER SCIENCE & IT   -   Database Management Systems

What is the primary purpose of normalization in database design?

The primary purpose of normalization is to reduce data redundancy and eliminate undesirable characteristics like insertion, update, and deletion anomalies. By organizing data into tables and defining relationships between them, normalization ensures that each piece of data is stored only once.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Database Management Systems

When is a database said to be in the Third Normal Form (3NF)?

A database is in the Third Normal Form (3NF) if it is in the Second Normal Form (2NF) and all its attributes are functionally dependent only on the primary key, meaning there are no transitive dependencies. This helps to further reduce data redundancy and maintain data integrity.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Database Management Systems

Where would you typically find the definition of a database schema?

The definition of a database schema, which includes the structure of the tables, fields, and relationships, is stored in the database management system's metadata. This metadata provides a blueprint for how data is organized and accessed within the database.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Database Management Systems

How to ensure ACID properties are maintained in a transaction?

To ensure ACID (Atomicity, Consistency, Isolation, Durability) properties are maintained in a transaction, it is essential to use the transaction management features provided by the database management system. These features ensure that all operations within a transaction are completed successfully and consistently, even in the event of a failure.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Database Management Systems

Which type of database index is typically used to improve the speed of queries that involve range searches?

B-tree indexes are typically used to improve the speed of queries that involve range searches because they maintain the sorted order of data. This makes it efficient to search for a range of values, as the B-tree structure allows for quick navigation to the starting point of the range and sequential access to the subsequent entries.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Computer Networks & Security

What is the purpose of a subnet mask in IP networking?

A subnet mask is used to divide an IP address into network and host portions. It determines which part of the IP address represents the network ID and which part represents the host ID, allowing routers to determine the destination network for data forwarding.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Computer Networks & Security

When should an organization implement two-factor authentication (2FA) for remote access to its network resources?

Two-factor authentication (2FA) should be implemented whenever employees work remotely or access sensitive data to add an extra layer of security beyond just passwords. It helps mitigate the risk of unauthorized access, especially when accessing critical systems from outside the corporate network.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Computer Networks & Security

Where is the most secure location to place a firewall within a network architecture?

Placing a firewall between the router and the internal network is the most secure location because it allows the firewall to filter both incoming and outgoing traffic, protecting the internal network from external threats while also providing control over outgoing traffic.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Computer Networks & Security

Who is responsible for managing digital certificates in a Public Key Infrastructure (PKI) system?

The Certificate Authority (CA) is responsible for managing digital certificates in a Public Key Infrastructure (PKI) system. It issues, revokes, and manages digital certificates, verifying the identity of entities in a network and ensuring secure communication through encryption.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Computer Networks & Security

Why is it important to regularly update software and firmware in network devices?

Regularly updating software and firmware in network devices is essential to fix security vulnerabilities and bugs that could be exploited by attackers. These updates often include patches and fixes to address newly discovered vulnerabilities, reducing the risk of security breaches and data loss.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Operating Systems

What is the main purpose of a context switch in an operating system?

A context switch occurs when the operating system saves the state of the currently running process and loads the state of another process. This allows the CPU to switch between processes efficiently, enabling multitasking and better utilization of system resources.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Operating Systems

When does a deadlock occur in a system?

Deadlock occurs when two or more processes are unable to proceed because each is waiting for a resource held by the other. This situation results in a standstill where none of the processes can continue execution.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Operating Systems

Where is the Page Table typically stored in a computer system?

The Page Table is typically stored in the main memory (RAM). It is used by the operating system to keep track of the mapping between virtual addresses and physical addresses, facilitating virtual memory management.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Operating Systems

What mechanism does an operating system use to handle the execution of multiple processes that require frequent access to the CPU?

Round-robin scheduling is a time-sharing scheduling algorithm used by the operating system to handle the execution of multiple processes. Each process is assigned a fixed time slot (quantum), and processes are cycled through in a circular order, ensuring that all processes get a fair share of CPU time.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Operating Systems

How to resolve the critical section problem in concurrent programming?

The critical section problem can be resolved using synchronization mechanisms such as semaphores. Semaphores are variables used to control access to common resources by multiple processes in a concurrent system, ensuring that only one process can enter the critical section at a time.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Operating Systems

Which memory management scheme allows the physical address space of a process to be non-contiguous?

Paging is a memory management scheme that allows the physical address space of a process to be non-contiguous. It eliminates the need for contiguous allocation of physical memory and thus reduces fragmentation by dividing memory into fixed-sized pages.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Operating Systems

Why do modern operating systems use preemptive multitasking?

Modern operating systems use preemptive multitasking to enhance user interactivity and system responsiveness. It allows the operating system to interrupt a running process and switch the CPU to another process, ensuring that all processes receive appropriate attention and that the system remains responsive to user inputs.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Operating Systems

When is the "thrashing" condition likely to occur in a system using virtual memory?

Thrashing occurs when a system has insufficient physical memory, causing excessive paging as the operating system continuously swaps data between RAM and disk. This leads to high overhead and severely degrades system performance, as more time is spent on paging rather than executing processes.
Tail Briz ENGINEERING   -   Electrical Engineering

In a buck-boost converter circuit, if the duty cycle of the switch is increased, what effect does it have on the output voltage?

In a buck-boost converter, increasing the duty cycle of the switch decreases the output voltage since it increases the time during which the switch is off, reducing the average voltage across the load.
Tail Briz ENGINEERING   -   Electrical Engineering

A transformer has a turns ratio of 1:10. If the primary winding has 500 turns, how many turns are there in the secondary winding?

The turns ratio of 1:10 means that for every turn in the primary winding, there are 10 turns in the secondary winding. Therefore, if the primary winding has 500 turns, the secondary winding will have 500 x 10 = 5000 turns.
Tail Briz ENGINEERING   -   Electrical Engineering

What is the primary purpose of using transformers in the transmission and distribution of electrical power?

Transformers are used in transmission and distribution systems to step up voltage for long-distance transmission to reduce losses and then step down voltage for distribution to end-users.
Tail Briz ENGINEERING   -   Electrical Engineering

In a separately excited DC motor, if the field winding is open-circuited while the armature winding is connected to a DC supply, what will happen to the motor speed?

In a separately excited DC motor, the speed is primarily controlled by the armature voltage. Opening the field winding circuit does not affect the armature voltage, so the motor speed remains unchanged.
Tail Briz ENGINEERING   -   Electrical Engineering

In a DC generator, what is the function of the commutator?

The commutator in a DC generator converts the alternating voltage induced in the armature winding into direct current by reversing the direction of current flow in each armature coil as it rotates.
Tail Briz ENGINEERING   -   Civil Engineering

What is the maximum allowable compressive strength of concrete for a reinforced concrete beam according to ACI 318-19?

According to ACI 318-19, the maximum allowable compressive strength of concrete for a reinforced concrete beam is 6,000 psi (41.4 MPa) to ensure ductility and prevent brittle failure.
Tail Briz ENGINEERING   -   Civil Engineering

A soil sample has a liquid limit of 40% and a plastic limit of 20%. What is its plasticity index?

The plasticity index (PI) is calculated as PI = LL - PL, where LL is the liquid limit and PL is the plastic limit. In this case, PI = 40 - 20 = 20.
Tail Briz ENGINEERING   -   Civil Engineering

What is the recommended minimum stopping sight distance (SSD) for a highway with a design speed of 60 km/h?

According to the AASHTO Green Book, the minimum SSD for a highway with a design speed of 60 km/h is approximately 100 m, considering a perception-reaction time of 2.5 seconds and a deceleration rate of 3.5 m/s^2.
Tail Briz ENGINEERING   -   Civil Engineering

A simply supported beam with a span of 8 m is subjected to a point load of 10 kN at midspan. What is the maximum bending moment in the beam?

The maximum bending moment in a simply supported beam occurs at midspan and is calculated as M = (w x L) / 4, where w is the point load and L is the span. In this case, M = (10 kN x 8 m) / 4 = 40 kNm.
Tail Briz ENGINEERING   -   Civil Engineering

What is the recommended minimum pressure head required for a water distribution system to ensure adequate flow and pressure?

According to the AWWA standards, the minimum pressure head required for a water distribution system is approximately 20 m (66 ft) to ensure adequate flow and pressure for domestic and commercial uses.
Tail Briz ENGINEERING   -   Civil Engineering

In the design of reinforced concrete beams, what is the purpose of providing shear reinforcement such as stirrups or links?

Shear reinforcement, such as stirrups or links, is provided in reinforced concrete beams to increase their shear capacity and prevent shear failure.
Tail Briz ENGINEERING   -   Civil Engineering

Which equation governs the flow of water through a porous medium, considering both Darcy's law and the continuity equation?

The Dupuit-Forchheimer equation combines Darcy's law and the continuity equation to describe the flow of water through porous media.
Tail Briz ENGINEERING   -   Civil Engineering

What is the purpose of a detention basin in stormwater management?

Detention basins are designed to temporarily store excess stormwater runoff, reducing peak flow rates and preventing flooding downstream.
Tail Briz ENGINEERING   -   Civil Engineering

Which method of structural analysis is particularly suitable for analysing tall and slender structures subjected to lateral loads, such as skyscrapers?

The finite element method is well-suited for analyzing complex structures like skyscrapers under lateral loads due to its ability to model geometric and material nonlinearities.
Tail Briz ENGINEERING   -   Civil Engineering

What is the purpose of a hydrograph in hydrology?

A hydrograph is a graphical representation of river flow over time and is commonly used in hydrology to model flood routing and assess flood risk.
Tail Briz ENGINEERING   -   Mechanical Engineering

Which of the following materials exhibits the highest strength-to-weight ratio at room temperature?

Carbon fiber reinforced polymer (CFRP) composites offer exceptional strength-to-weight ratios due to the high strength of carbon fibers combined with the low density of the polymer matrix.
Tail Briz ENGINEERING   -   Mechanical Engineering

In a static equilibrium system, what condition must be satisfied for the sum of all forces acting on a rigid body?

In a static equilibrium system, the sum of all forces acting on a rigid body must be zero to ensure that the body remains stationary.
Tail Briz ENGINEERING   -   Mechanical Engineering

What is the Reynolds number used to determine in fluid flow analysis?

The Reynolds number is a dimensionless parameter used in fluid mechanics to predict the flow regime (i.e., laminar, transitional, or turbulent) of a fluid flow based on its velocity, density, viscosity, and characteristic length.
Tail Briz ENGINEERING   -   Mechanical Engineering

Which mode of heat transfer predominates in a vacuum?

Radiation is the primary mode of heat transfer in a vacuum because it does not require a medium for energy transfer and can occur through electromagnetic waves.
Tail Briz ENGINEERING   -   Mechanical Engineering

What is the main function of a Pelton wheel turbine in a hydropower plant?

A Pelton wheel turbine is designed to extract energy from high-pressure water jets and convert it into rotational mechanical energy, which is then used to drive an electrical generator in a hydropower plant.
Mushkovic PHYSICS   -   Physics

When a helium atom loses an electron, it becomes:

When a helium atom loses an electron, it becomes a positively charged ion (He⁺), also known as a positive helium ion. It is not an alpha particle (which consists of 2 protons and 2 neutrons), nor a proton (which is a hydrogen nucleus), nor a negative ion (which would require gaining an electron).
Mushkovic PHYSICS   -   Physics

Beta ray emitted by a radioactive substance is:

Beta particles (β-) are high-energy, high-speed electrons emitted by the nucleus during radioactive decay, specifically from the transformation of a neutron into a proton within the nucleus, releasing an electron (beta particle) and an antineutrino.
Mushkovic PHYSICS   -   Physics

An electric charge in uniform motion produces:

An electric charge in uniform motion produces both electric and magnetic fields. The moving charge creates an electric field due to its charge and a magnetic field due to its motion.
Mushkovic PHYSICS   -   Physics

What is emitted by a hot metal filament in a cathode ray tube?

A hot metal filament in a cathode ray tube emits electrons. These emitted electrons form the cathode rays that travel from the cathode to the anode within the tube.
Mushkovic PHYSICS   -   Physics

If the mass of the bob of a pendulum is doubled its time period is:

The time period of a simple pendulum is given by 𝑇 = 2𝜋 √ 𝐿 / g, where 𝐿 is the length of the pendulum and 𝑔 is the acceleration due to gravity. The mass of the bob does not affect the time period of the pendulum.
Mushkovic PHYSICS   -   Physics

The center of Newton rings is dark due to

Newton's rings are a pattern of interference fringes. The center of Newton's rings appears dark because of destructive interference between the light waves reflected from the top and bottom surfaces of the thin air film between the lens and the glass plate.
Mushkovic PHYSICS   -   Physics

Which one is the most stable element on the basis of binding energy?

The most stable element on the basis of binding energy per nucleon is iron (Fe). The binding energy per nucleon reaches a maximum for iron-56, which means it is the most stable nucleus. This concept is crucial in nuclear physics, as it explains why nuclear fusion occurs in stars up to iron and why heavier elements are formed by supernovae explosions.
Mushkovic PHYSICS   -   Physics

Resistance in RC circuit of time constant 2 seconds is 1000 Ohms. What is the value of C in the circuit?

The time constant (𝜏) for an RC circuit is given by the product of resistance (R) and capacitance (C): 𝜏 = R⋅C. given 𝜏 = 2 seconds and R = 1000 ohms: C = 𝜏 / R = 2s / 1000 ohms = 0.002 farads = 2000 μfarads however, as 2 μF aligns closely with the other options, we'll check: C = 2s / 1000 ohms = 2 x 10−3 F = 2000 μF
Mushkovic PHYSICS   -   Physics

The Lenz’s law refers to induced __________

Lenz's Law states that the direction of the induced electromotive force (emf) will always be such that it opposes the change in magnetic flux that produced it. This is a fundamental principle in electromagnetism and is key to understanding how induction works.
Mushkovic PHYSICS   -   Physics

In which of the following, output is similar to NAND gate if input A=0 and input B=1.

For inputs A=0 and B=1: NAND gate outputs 1 (since 0 AND 1 is 0, and NOT 0 is 1). XOR gate outputs 1 (since XOR is true when inputs differ) Hence, the correct option is C) XOR.
Mushkovic PHYSICS   -   Physics

For atomic hydrogen spectrum, which of the following series lies in visible region of electromagnetic spectrum?

The Balmer series of the hydrogen spectrum lies in the visible region. It involves transitions where the final energy level is n=2, and the initial levels are n>2.
Mushkovic PHYSICS   -   Physics

__________ are the particles that experience strong nuclear force.

Particles that experience the strong nuclear force are nucleons, i.e., protons and neutrons. This force binds the nucleus together.
Mushkovic PHYSICS   -   Physics

The vertical velocity of ball thrown upward __________ with time.

When a ball is thrown upward, its vertical velocity decreases linearly with time due to the constant acceleration of gravity acting downward.
Mushkovic PHYSICS   -   Physics

The force required to bend the normally straight path of a particle into a circular path is called __________ force.

The force that keeps a particle moving in a circular path and is directed towards the center of the circle is called centripetal force.
Mushkovic PHYSICS   -   Physics

A disc at rest without slipping, rolls down a hill of height (3 x 9.8) m. What is its speed in m/sec when it reaches at the bottom?

x he potential energy at the top converts to kinetic energy at the bottom. Using energy conservation: mgh = 1/2mv2. v = /2gh and h = 3 x 9.8 = 29.4 m and then v = /2 x 9.8 x 29.4 ~~ 11.4 m / s
Mushkovic PHYSICS   -   Physics

Tuning of the radio is the best example of electrical __________

Tuning a radio involves adjusting the frequency of the LC circuit to resonate at the frequency of the desired radio station.
Mushkovic PHYSICS   -   Physics

A standing wave pattern is formed when the length of string is an integral multiple of __________ wavelength.

A standing wave on a string fixed at both ends forms when the length of the string is an integral multiple of half wavelengths.
Mushkovic PHYSICS   -   Physics

Which of the following lights travels the fastest in optical fibres?

Infra-red light travels fastest in optical fibers due to lower attenuation and dispersion compared to visible light.
Mushkovic PHYSICS   -   Physics

The algebraic sum of potential changes in a closed circuit is zero is Kirchhoff’s __________ rule.

Kirchhoff's second rule, also known as the voltage law (KVL), states that the sum of the electrical potential differences (voltages) around any closed circuit is zero.
Mushkovic PHYSICS   -   Physics

In LED when an electron combines with a __________ during forward bias conduction, a photon of visible light is emitted.

In an LED, when an electron recombines with a hole in the p-n junction, energy is released in the form of a photon, emitting visible light.
Fani Warraich CHEMISTRY   -   Chemistry

Which type of bonding is present in NH4Cl?

NH4Cl (Ammonium chloride) exhibits multiple types of bonding: Ionic Bonding: Between NH4+ (ammonium ion) and Cl- (chloride ion). Covalent Bonding: Within the NH4+ ion itself, between nitrogen and hydrogen atoms. Coordinate Covalent Bonding: One of the N-H bonds in NH4+ is formed by nitrogen donating a lone pair to a hydrogen ion (H+).
Fani Warraich CHEMISTRY   -   Chemistry

When CuSO4 is electrolyzed in aqueous solution using copper electrodes, then the substance which deposits at the cathode is:

During the electrolysis of CuSO4 using copper electrodes: At the cathode (negative electrode), copper ions (Cu2+) from the solution are reduced to copper metal (Cu): Cu 2 + + 2 e − → Cu Cu 2+ +2e − →Cu At the anode (positive electrode), copper metal dissolves into the solution as Cu2+ ions: Cu → Cu 2 + + 2 e − Cu→Cu 2+ +2e − Thus, copper metal deposits on the cathode.
Mushkovic CHEMISTRY   -   Chemistry

Aldehydes can be synthesized by the oxidation of:

Aldehydes are synthesized by the oxidation of primary alcohols. The oxidation process involves removing hydrogen atoms from the primary alcohol, forming an aldehyde. For example, the oxidation of ethanol (a primary alcohol) produces acetaldehyde: CH 3 CH 2 OH → CH 3 CHO + H 2 O CH 3 ​ CH 2 ​ OH→CH 3 ​ CHO+H 2 ​ O
Mushkovic CHEMISTRY   -   Chemistry

The products of the fermentation of a sugar are ethanol and:

During fermentation, sugars such as glucose are converted by yeast or bacteria into ethanol and carbon dioxide. The general equation for this process is: C 6 H 12 O 6 → 2 C 2 H 5 OH + 2 CO 2 C 6 ​ H 12 ​ O 6 ​ →2C 2 ​ H 5 ​ OH+2CO 2 ​ Thus, the products of sugar fermentation are ethanol (C2H5OH) and carbon dioxide (CO2).
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the main purpose of a transformer in electrical circuits?

Transformers are used to change the voltage levels in AC circuits, either stepping up or stepping down the voltage.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which theorem states that any linear electrical network with multiple sources can be replaced by an equivalent single voltage source and a series resistor?

Thevenin's Theorem simplifies complex networks to a single voltage source and series resistance.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the primary function of a Zener diode in electronic circuits?

Zener diodes are used for voltage regulation, allowing current to flow in the reverse direction when a specific breakdown voltage is reached.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which type of motor is known for its high starting torque and variable speed control?

DC motors provide high starting torque and are easily controlled for variable speed applications.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In a three-phase power system, what is the phase difference between each phase?

The phase difference in a three-phase system is 120 degrees, ensuring balanced power distribution.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which component in an AC circuit is responsible for causing a phase shift between voltage and current?

Capacitors cause a phase shift between voltage and current in AC circuits, with current leading voltage by 90 degrees.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the primary advantage of using an operational amplifier (op-amp) in electronic circuits?

Op-amps are favored for their high input impedance and low output impedance, making them versatile in signal amplification and processing.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which method is used to analyze the stability of control systems by examining the locations of poles in the complex plane?

The root locus method analyzes control system stability by plotting the locations of system poles in the complex plane.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In digital electronics, what is the purpose of a flip-flop circuit?

Flip-flops are used for memory storage in digital circuits, storing binary information as 0 or 1.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the main characteristic of a Schottky diode compared to a regular silicon diode?

Schottky diodes have lower reverse recovery time, making them ideal for high-speed switching applications.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which type of filter is used to pass signals with frequencies within a certain range and attenuate signals outside that range?

Band-pass filters pass signals within a specified frequency range and attenuate those outside the range.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In power systems, what is the purpose of a synchronous condenser?

Synchronous condensers are used for power factor correction, improving the efficiency and stability of power systems.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which device is used to measure the electric power consumed by a load in a circuit?

Wattmeters measure the electric power consumed by a load, providing readings in watts.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the main advantage of using a buck converter in power electronics?

Buck converters reduce the input voltage to a lower output voltage, making them efficient for power supply applications.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which principle explains the operation of a thermocouple in temperature measurement?

The Seebeck Effect explains how a thermocouple generates a voltage proportional to the temperature difference between its junctions.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In signal processing, what is the primary purpose of a Fourier transform?

The Fourier transform converts signals from the time domain to the frequency domain, allowing analysis of signal frequency components.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the primary difference between a MOSFET and a BJT?

MOSFETs are voltage-controlled devices, whereas BJTs are current-controlled devices, affecting their use in different applications.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which component is essential for providing isolation between the primary and secondary windings of a transformer?

Insulation provides electrical isolation between the primary and secondary windings, ensuring safety and efficiency.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the main purpose of using a triac in AC power control circuits?

Triacs allow bidirectional control of AC power, making them suitable for applications like light dimming and motor speed control.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In control systems, what is the significance of the transfer function?

The transfer function represents the system dynamics, relating input to output and facilitating analysis of system behavior.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which law describes the magnetic force between two parallel current-carrying conductors?

Ampere's Law describes the magnetic force between two parallel current-carrying conductors, indicating that the force is proportional to the currents and inversely proportional to the distance between them.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the primary function of a varistor in electronic circuits?

Varistors protect circuits from voltage surges by changing their resistance in response to voltage changes, absorbing excess energy.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In communication systems, what is the purpose of modulation?

Modulation allows signals to be transmitted over long distances by varying a carrier signal's properties, such as amplitude, frequency, or phase.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which type of transformer connection is commonly used in power transmission to reduce phase imbalance?

Delta-star connections are commonly used in power transmission to reduce phase imbalance and provide a neutral point for grounding.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the primary advantage of using a CMOS technology in integrated circuits?

CMOS technology is favored for its low power consumption, making it ideal for battery-powered and portable devices.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In electrical machines, what is the purpose of using a commutator in a DC motor?

The commutator in a DC motor reverses the current direction in the armature windings, ensuring unidirectional torque.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which method is used to analyze the frequency response of linear time-invariant (LTI) systems?

The Bode plot is used to analyze the frequency response of LTI systems, providing insights into gain and phase shift across frequencies.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the primary characteristic of a superconducting material?

Superconducting materials exhibit zero electrical resistivity below a certain critical temperature, allowing for lossless current flow.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In microcontrollers, what is the main function of an ADC (Analog-to-Digital Converter)?

ADCs convert analog signals to digital form, enabling microcontrollers to process real-world analog inputs.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which phenomenon describes the increase in current flow in a conductor due to reduced cross-sectional area at high frequencies?

The skin effect describes the increase in current density near the surface of a conductor at high frequencies, reducing the effective cross-sectional area.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the main purpose of using a relay in electrical circuits?

Relays provide electrical isolation between control and load circuits, enabling low-power signals to control high-power devices.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In AC circuits, what is the significance of power factor?

Power factor is the ratio of real power to apparent power, indicating the efficiency of power usage in AC circuits.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the primary difference between a synchronous motor and an induction motor?

Synchronous motors operate at a constant speed synchronized with the supply frequency, unlike induction motors, which have a variable speed.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which type of circuit is used to generate a specific frequency waveform?

Oscillators generate specific frequency waveforms, providing stable signal sources for various applications.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In power electronics, what is the main purpose of a rectifier?

Rectifiers convert AC voltage to DC voltage, making them essential in power supplies for electronic devices.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the primary function of a thyristor in power control circuits?

Thyristors are used for controlled rectification in power control circuits, allowing precise control of current flow.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which method is used to analyze transient response in electrical circuits?

The Laplace transform is used to analyze the transient response of electrical circuits, providing insights into system behavior over time.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the significance of the breakover voltage in a silicon-controlled rectifier (SCR)?

The breakover voltage is the minimum forward voltage at which an SCR conducts, triggering its conduction state.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In the context of electromagnetic waves, what is the primary function of a waveguide?

Waveguides are used to transmit electromagnetic waves efficiently, guiding them along a specific path with minimal loss.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

What is the main advantage of using a brushless DC motor over a brushed DC motor?

Brushless DC motors offer higher efficiency, longer lifespan, and lower maintenance compared to brushed DC motors.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In electrical power systems, what is the purpose of using a capacitor bank?

Capacitor banks are used for power factor correction, improving the efficiency and stability of power systems.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which component is essential for converting solar energy into electrical energy in photovoltaic systems?

Solar panels convert solar energy into electrical energy, forming the core component of photovoltaic systems.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

In signal processing, what is the purpose of a digital filter?

Digital filters are used to reduce noise and unwanted components from digital signals, improving signal quality.
Muntaha Nasir ENGINEERING   -   Electrical Engineering

Which type of memory is used for storing firmware in embedded systems?

Flash memory is used to store firmware in embedded systems due to its non-volatile nature and ability to retain data without power.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Database Management Systems

A child entity in ER diagrams is:

In ER diagrams, a child entity inherits attributes and relations from a parent entity, often representing a subclass or specialized entity.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Database Management Systems

Boyce Codd Normal Form:

Boyce-Codd Normal Form (BCNF) is a higher normal form that ensures every determinant in the database is a candidate key, addressing certain types of anomalies that 3NF does not.
Tamoban Javnoi COMPUTER SCIENCE & IT   -   Database Management Systems

DDL is used to:

Data Definition Language (DDL) is used to define and manage the structure of a database, including creating, altering, and dropping tables and schemas.
Harlequin Misha COMPUTER SCIENCE & IT   -   Computer Networks & Security

Network traffic estimation is:

Network traffic estimation is complex and typically requires sophisticated models, not simple linear equations or AI alone.
Harlequin Misha COMPUTER SCIENCE & IT   -   Computer Networks & Security

Which of the following is the most efficient encoding to send data via networks? Also consider the reasoning in your answer.

Binary encoding is efficient for data transmission as it is the most fundamental form of data representation and aligns well with digital systems.
Harlequin Misha COMPUTER SCIENCE & IT   -   Operating Systems

A computer is in System mode when:

System mode refers to the mode in which the CPU executes operating system code, giving it unrestricted access to hardware resources.
Harlequin Misha COMPUTER SCIENCE & IT   -   Operating Systems

Which is better, Time slicing or time sharing?

Time slicing is a technique within time-sharing, so they are not directly comparable as one is a subset of the other.
Harlequin Misha COMPUTER SCIENCE & IT   -   Operating Systems

Which of the following are/is true?

Operating systems still need to consider low-level details and are often built with assembly language components for efficiency.
shahzaib hassan CHEMISTRY   -   Chemistry

What is the molecular geometry of methane (CH4) according to VSEPR theory?

The tetrahedral shape is like a pyramid with a triangular base, where the carbon atom sits in the middle and the four hydrogen atoms form the corners. This shape minimizes the repulsion between the four bonding pairs of electrons.
shahzaib hassan CHEMISTRY   -   Chemistry

Which of the following is an example of a strong acid?

A strong acid, like hydrochloric acid, is like a superhero that gives away all of its protons in water. It dissociates completely, making the solution very acidic, while weak acids only give away some protons.
shahzaib hassan CHEMISTRY   -   Chemistry

What is the hybridization of the carbon atoms in ethene (C2H4)?

The carbon atoms in ethene are like juggling three balloons ? they need three bonds in a flat shape. So, they use "sp2" hybrid orbitals, which combine one s orbital and two p orbitals, leaving one p orbital for the double bond.
shahzaib hassan CHEMISTRY   -   Chemistry

Which of the following molecules exhibits hydrogen bonding?

Hydrogen bonding is like a very strong handshake between molecules that have hydrogen attached to highly electronegative atoms like nitrogen, oxygen, or fluorine. In NH3, the hydrogen bonds with nitrogen, making a strong connection.
shahzaib hassan CHEMISTRY   -   Chemistry

Which process describes the conversion of a liquid to a gas at a temperature below its boiling point?

Evaporation is like when you leave a puddle of water on a sunny day, and it disappears even though it never boiled. The molecules with the most energy escape from the liquid into the air, turning into gas.
shahzaib hassan CHEMISTRY   -   Chemistry

What is the relationship between pressure and volume for a gas at constant temperature, according to Boyle's Law?

Boyle's Law is like squeezing a balloon. When you press down (increase pressure), the balloon shrinks (volume decreases). The pressure and volume of a gas move in opposite directions when temperature stays the same.
shahzaib hassan CHEMISTRY   -   Chemistry

Which element has the highest electronegativity?

Electronegativity is like the element?s desire to steal an electron. Fluorine is the most ?greedy? element, meaning it attracts electrons more strongly than any other element on the periodic table.
shahzaib hassan CHEMISTRY   -   Chemistry

What is the major product when 2-butene undergoes hydrogenation in the presence of a platinum catalyst?

Hydrogenation is like smoothing out wrinkles in fabric. The double bond in 2-butene is ?flattened? into a single bond, turning the molecule into butane, a saturated hydrocarbon.
shahzaib hassan CHEMISTRY   -   Chemistry

Which of the following salts is insoluble in water?

Solubility in water is like trying to dissolve sugar in tea. Some salts dissolve easily, but AgCl doesn?t. It forms a solid precipitate because its ions don?t separate easily in water, unlike salts like NaCl.
shahzaib hassan CHEMISTRY   -   Chemistry

Which type of radioactive decay results in the release of an electron from the nucleus?

In beta decay, it's like the nucleus of an atom suddenly ejects an electron (beta particle) to become more stable. A neutron in the nucleus turns into a proton, and the electron is released.
shahzaib hassan CHEMISTRY   -   Chemistry

What is the oxidation state of sulfur in sulfuric acid (H2SO4)?

Oxidation state is like counting the charges sulfur carries. In H2SO4, sulfur has to balance the negative charges from the oxygen atoms, so it "gives away" six electrons, giving it an oxidation state of +6.
shahzaib hassan CHEMISTRY   -   Chemistry

Which of the following describes the process of reducing a ketone to an alcohol?

Reduction is like adding extra electrons to a molecule. In this case, you're adding hydrogen to a ketone, converting it into an alcohol. This process usually involves a reducing agent like NaBH4.
shahzaib hassan CHEMISTRY   -   Chemistry

What is the main characteristic of a buffer solution?

A buffer solution is like a shock absorber for pH. Even if you add a little acid or base, it keeps the pH stable because it contains both a weak acid and its conjugate base (or a weak base and its conjugate acid).
shahzaib hassan CHEMISTRY   -   Chemistry

Which gas law explains the relationship between temperature and volume at constant pressure?

Charles? Law is like a balloon in the sun ? as the gas inside heats up, the balloon gets bigger. It says that when the temperature of a gas increases, its volume also increases, as long as pressure stays constant.
shahzaib hassan CHEMISTRY   -   Chemistry

What is the coordination number of the central metal ion in the complex [Co(NH3)6]3+?

The coordination number is like counting how many hands are holding onto the central metal. In this case, cobalt (Co) is held by six ammonia (NH3) molecules, so its coordination number is 6.
shahzaib hassan CHEMISTRY   -   Chemistry

Which of the following best describes a Lewis acid?

A Lewis acid is like an empty seat waiting for someone to sit down. It accepts a pair of electrons, whereas a Lewis base is like the person offering the electrons to fill the seat.
shahzaib hassan CHEMISTRY   -   Chemistry

In a galvanic cell, what happens at the anode?

The anode is like a battery losing charge. In a galvanic cell, oxidation occurs at the anode, meaning electrons are lost and flow toward the cathode, where reduction happens.
shahzaib hassan CHEMISTRY   -   Chemistry

What is the empirical formula of a compound with 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?

The empirical formula is like a recipe with the simplest ingredients. This compound?s simplest ratio of carbon, hydrogen, and oxygen comes out to be CH2O, meaning for every carbon atom, there are two hydrogens and one oxygen.
shahzaib hassan CHEMISTRY   -   Chemistry

Which of the following processes occurs at the cathode in an electrolytic cell?

In an electrolytic cell, reduction happens at the cathode, which is like gaining electrons. The electrons are added to ions or atoms, reducing them to a lower oxidation state.
shahzaib hassan CHEMISTRY   -   Chemistry

What type of intermolecular force is the strongest?

Hydrogen bonding is like a super strong handshake between molecules where hydrogen is involved with highly electronegative elements like oxygen or nitrogen. This makes the bonds stronger than other forces like dipole-dipole or dispersion.

Contributor(8)

Fani Warraich
shahzaib hassan
Shalisha Ladawn
Tamoban Javnoi
Tail Briz
Mushkovic
Harlequin Misha
Muntaha Nasir