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Electronics Engineering QUESTION #11695

A power MOSFET is suspected faulty. After discharging the gate, the drain-source reads $2\,\Omega$ with the ohmmeter regardless of probe direction. This indicates:

Normal — MOSFETs have a built-in body diode
The MOSFET is operating in the linear region
Drain-source channel is short-circuited — device failed✔️
The threshold voltage $V_{GS(th)}$ has been exceeded

Correct Answer Logic:

A healthy power MOSFET D-S should read OL in both directions (with gate discharged), except for the body diode which gives ~0.5–0.7 V forward drop in one direction. A symmetrically low resistance D-S reading in both directions indicates a drain-source short — typical of avalanche damage, overcurrent, or overvoltage failure.

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Physics QUESTION #990

Question 2

Assertion (A): In Young's double slit experiment, fringes produced by red light are wider compared to blue light. Reason (R): Fringe width is directly proportional to the wavelength of light. Choose the correct option:

Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
(A) is true but (R) is false
Both (A) and (R) are true and (R) is the correct explanation of (A)
(A) is false but (R) is true✔️

Correct Answer Logic:

Fringe width $\beta = \frac{\lambda D}{d}$. Since $\lambda_{red} > \lambda_{blue}$, red fringes are wider, not closer. The assertion in the paper states red fringes are 'closer' which is false. But (R) is true. Hence (A) is false but (R) is true.

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Accounting & Finance QUESTION #6056

Question 3

Which accounting principle requires that expenses be matched to the revenues they helped generate, within the same accounting period?

Revenue recognition principle
Matching principle✔️
Cost principle
Full disclosure principle

Correct Answer Logic:

The Matching Principle (also called the matching concept) states that expenses must be recognized in the same period as the revenues they helped produce. For example, cost of goods sold is matched against the sales revenue of the same period. The revenue recognition principle deals with when to record revenue; the cost principle is about recording at historical cost; and the full disclosure principle requires reporting of all relevant information.

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Maths QUESTION #4555

Question 4

Simplify $\frac{12}{18}$ to lowest terms:

$\frac{6}{9}$
$\frac{4}{6}$
$\frac{2}{3}$✔️
$\frac{1}{2}$

Correct Answer Logic:

GCD of $12$ and $18$ is $6$. So $\frac{12}{18} = \frac{12 \div 6}{18 \div 6} = \frac{2}{3}$

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Academic/Professional (Social Sciences) QUESTION #6500

Question 5

Which term refers to the unintended and unrecognized consequences of a social process?

Manifest Function
Latent Function✔️
Dysfunction
Social Fact

Correct Answer Logic:

Robert Merton distinguished between manifest (intended) and latent (unintended) functions.

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Islamic Studies QUESTION #7698

Question 6

Punishment of false accusation of Zina is mentioned in which surah of Holy Quran?

Al-Qamar
Al-Najam
Al-Nisa
None of these✔️

Correct Answer Logic:

The punishment for false accusation of adultery (Qadhf) is mentioned in Surah Al-Nur (Chapter 24), not in the options provided. The punishment is 80 lashes for those who falsely accuse chaste women without bringing four witnesses.

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MBBS QUESTION #10250

Question 7

At high altitude, the fall in barometric pressure causes hypoxia despite the fraction of inspired oxygen (FiO2, 21%) remaining unchanged. Using $P_iO_2 = FiO_2 \times (P_{atm} - P_{H_2O})$, which parameter is primarily responsible?

The partial pressure of inspired oxygen (PiO2) falls because atmospheric pressure (Patm) falls✔️
Hemoglobin concentration falls immediately at altitude
Alveolar ventilation rate falls directly and independently of oxygen levels
Diffusion capacity of the lung membrane itself decreases

Correct Answer Logic:

Since FiO2 (21%) and water vapor pressure are essentially constant, a fall in total atmospheric pressure at altitude directly reduces the partial pressure of inspired oxygen (PiO2), reducing the driving gradient for oxygen diffusion into blood — the fundamental cause of high-altitude hypoxia.

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Psychology QUESTION #1456

Question 8

The sympathetic nervous system is responsible for:

Rest and relaxation
Voluntary muscle movement
\"Fight or flight\" responses✔️
Digesting food

Correct Answer Logic:

The sympathetic nervous system (SNS) is a division of the autonomic nervous system that activates the 'fight or flight' response during perceived threats or stress. It increases heart rate, dilates pupils, inhibits digestion, and releases adrenaline. The parasympathetic nervous system ('rest and digest') is responsible for rest, relaxation, and digestion. Voluntary muscle movement is controlled by the somatic nervous system.

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Security Measures to Maintain Law and Order QUESTION #863

Question 9

"Transparency" in security measures to maintain order involves:

Giving away secrets
Clear signage and public information✔️
Open doors to the armory
Publicly sharing staff files

Correct Answer Logic:

Ethical security includes informing the public of their rights and the security rules (e.g., prohibited items) through clear communication.

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Accounting & Finance QUESTION #6205

Question 10

What does a high 'Price-Earnings (PE) Ratio' typically suggest?

The firm is currently losing money.
Investors expect significant future growth.✔️
The stock is undervalued.
The firm has too much debt.

Correct Answer Logic:

A high PE ratio often indicates that the market expects high future earnings growth [cite: 43].

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Bio-Technology QUESTION #10585

Question 11

A photobioreactor is specifically designed to culture:

Obligate anaerobes such as methanogens
Photosynthetic microalgae and cyanobacteria that require light as an energy source✔️
High-density E. coli for recombinant protein production
Thermophilic bacteria growing above 70°C

Correct Answer Logic:

Photobioreactors provide controlled light, CO₂, and mixing for photosynthetic microalgae (e.g. Chlorella, Spirulina) and cyanobacteria. Products include β-carotene, astaxanthin, and biomass. Key design challenges include: photoinhibition at high light intensities, self-shading as cell density increases, and CO₂ mass transfer. Tubular loop, flat panel, and helical designs maximise surface-area-to-volume ratio for light penetration.

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Paper-I (Anatomy/Physiology and Biochemistry/Microbiology) QUESTION #3117

Question 12

The finger-like projections in the small intestine that increase surface area are called:

Cilia
Villi✔️
Flagella
Rugae

Correct Answer Logic:

Villi (and microvilli) are crucial for efficient absorption of nutrients.

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Psychology QUESTION #9860

Question 13

The term 'germ cell' in genetics refers to:

Somatic cells
Body cells
Ova and sperm cells✔️
Both somatic and body cells

Correct Answer Logic:

Germ cells are the reproductive cells — ova (eggs) and sperm — that carry genetic information to offspring. They undergo meiosis to produce gametes with half the normal chromosome number, distinct from somatic (body) cells.

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Security Measures to Maintain Law and Order QUESTION #890

Question 14

"Crowd Control" during a flight delay is a measure to maintain law & order primarily falling under:

Aviation Safety
Aviation Security✔️
Terminal Management
Public Relations

Correct Answer Logic:

Managing large, frustrated groups is a security function to prevent riots or breaches into the airside.

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Psychology QUESTION #9923

Question 15

Which of the following identified universal symbolic images in myths, art, and dreams as expressions of the collective unconscious?

Freud
Adler
Jung✔️
Horney

Correct Answer Logic:

Carl Jung identified archetypes — universal inherited symbolic images (Great Mother, Shadow, Hero, Self) found in myths, religions, and dreams across all cultures — stored in what he called the collective unconscious.

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Geography QUESTION #6345

Question 16

The concept of 'time-space convergence' in economic geography refers to:

Increasing speed reducing effective distance between places✔️
Synchronization of time zones for global business
Historical convergence of development levels
Urban areas expanding into rural zones

Correct Answer Logic:

Time-space convergence describes how transport/communication improvements reduce travel time between places, making them functionally closer despite unchanged physical distance. A trip taking weeks in the 1800s now takes hours, facilitating globalization.

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Mathematics QUESTION #7450

Question 17

If the lines $\frac{x-2}{1} = \frac{y-3}{1} = \frac{z-4}{-k}$ and $\frac{x-1}{k} = \frac{y-4}{2} = \frac{z-5}{1}$ are coplanar, then k can have:

any value
exactly one value
exactly two values✔️
exactly three values

Correct Answer Logic:

For two lines to be coplanar, the scalar triple product of their direction ratios and the vector joining points on the lines must be zero. The direction ratios are $(1, 1, -k)$ and $(k, 2, 1)$. A point on the first line is $(2, 3, 4)$ and on the second is $(1, 4, 5)$. The vector joining them is $(-1, 1, 1)$. Setting up the determinant: $\begin{vmatrix} -1 & 1 & 1 \\ 1 & 1 & -k \\ k & 2 & 1 \end{vmatrix} = 0$. Expanding: $-1(1+2k) - 1(1+k^2) + 1(2-k) = 0$, which simplifies to $k^2 + 3k = 0$, giving $k = 0$ or $k = -3$. Thus, k has exactly two values.

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Paper-I (Pharmaceutics II (Industrial and Quality Control) and Pharmaceutics III (Hospital and Community Pharmacy)) QUESTION #5725

Question 18

The $EPI$ schedule in Pakistan includes the $BCG$ vaccine. At what age and through which route is $0.05\text{ mL}$ of $BCG$ typically administered to an infant?

Birth, Intradermal✔️
6 Weeks, IM
9 Months, SC
14 Weeks, PO

Correct Answer Logic:

BCG is given at birth via the intradermal route.

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Reading and Writing (Module-1) QUESTION #5405

Question 19

Earth's atmosphere is bombarded by cosmic dust originating from several sources: short-period comets (SPCs), particles from the asteroid belt (ASTs), Halley-type comets (HTCs), and Oort cloud comets (OCCs). Some of the dust's material vaporizes in the atmosphere in a process called ablation, and the faster the particles move, the higher the rate of ablation. Astrophysicist Juan Diego Carrillo-Sánchez led a team that calculated average ablation rates for elements in the dust (such as iron and potassium) and showed that material in slower-moving SPC or AST dust has a lower rate than the same material in faster-moving HTC or OCC dust. For example, whereas the average ablation rate for iron from AST dust is 28%, the average rate for _______. Which choice most effectively uses data from the table to complete the example?

iron from SPC dust is 20%.
sodium from OCC dust is 100%.
iron from HTC dust is 90%.✔️
sodium from AST dust is 75%.

Correct Answer Logic:

The example illustrates lower ablation in slower-moving AST dust (28% for iron) versus higher ablation in faster-moving HTC dust (90% for iron).

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Dairy Food Science and Technology QUESTION #5994

Question 20

In the production of lassi, the distinctive refreshing taste results from:

Addition of sugar and cream to fresh milk
Dilution of dahi (yoghurt) with water ($1:0.5\text{–}1:2$ ratio) producing a blend of lactic acid, acetaldehyde ($\approx 25\text{–}40\;\text{ppm}$), and diacetyl aromas in a lower-viscosity product✔️
Addition of synthetic flavorings to buttermilk
Fermentation of milk with kefir grains

Correct Answer Logic:

Lassi is made by blending dahi (yoghurt) with water and optionally sugar, salt, or spices. The characteristic flavor comes from fermentation metabolites: lactic acid (tart), acetaldehyde ($\approx 25\text{–}40\;\text{ppm}$, 'green/yoghurty' aroma), and diacetyl (buttery note). Dilution reduces viscosity and caloric density.

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