Muntaha Nasir ENGINEERING - Electrical Engineering

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

A. Increases voltage. B. Reduces voltage. C. Increases current. D. Reduces current.

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Explanation

Buck converters reduce the input voltage to a lower output voltage, making them efficient for power supply applications.

Muntaha Nasir ENGINEERING - Electrical Engineering

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

A. Voltmeter. B. Ammeter. C. Wattmeter. D. Ohmmeter.

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Explanation

Wattmeters measure the electric power consumed by a load, providing readings in watts.

Muntaha Nasir ENGINEERING - Electrical Engineering

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

A. Power generation. B. Voltage regulation. C. Frequency conversion. D. Power factor correction.

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Explanation

Synchronous condensers are used for power factor correction, improving the efficiency and stability of power systems.

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?

A. Low-pass filter. B. High-pass filter. C. Band-pass filter. D. Notch filter.

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Explanation

Band-pass filters pass signals within a specified frequency range and attenuate those outside the range.

Muntaha Nasir ENGINEERING - Electrical Engineering

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

A. Higher forward voltage drop. B. Lower reverse recovery time. C. Higher reverse leakage current. D. Lower breakdown voltage.

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Explanation

Schottky diodes have lower reverse recovery time, making them ideal for high-speed switching applications.

Muntaha Nasir ENGINEERING - Electrical Engineering

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

A. Analog signal processing. B. Frequency modulation. C. Memory storage. D. Power regulation.

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Explanation

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

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?

A. Bode plot. B. Nyquist criterion. C. Root locus. D. Transfer function.

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Explanation

The root locus method analyzes control system stability by plotting the locations of system poles in the complex plane.

Muntaha Nasir ENGINEERING - Electrical Engineering

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

A. High input impedance. B. High output impedance. C. Low gain. D. Low bandwidth.

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Explanation

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

A. Resistor. B. Capacitor. C. Inductor. D. Transformer.

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Explanation

Capacitors cause a phase shift between voltage and current in AC circuits, with current leading voltage by 90 degrees.

Muntaha Nasir ENGINEERING - Electrical Engineering

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

A. 60 degrees. B. 90 degrees. C. 120 degrees. D. 180 degrees.

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Explanation

The phase difference in a three-phase system is 120 degrees, ensuring balanced power distribution.