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Power Electronics MCQ

SEMICONDUCTOR THEORY / DIODES & TRANSISTORS / OP-AMPS / ANALOGUE CIRCUITS / DIGITAL CIRCUITS / POWER ELECTRONICS / INTRUMENTATIONS

MCQTrip.com will test your knowledge of power electronics, including power devices and circuits, with our online multiple-choice questions. Get instant feedback and track your progress. Challenge yourself to get the highest score. Twenty (20) MCQ questions from our test bank will be randomly shown for every attempt. Passing mark for this test is 70%.

Objectives: To provide a comprehensive overview of power electronics and to test readers’ knowledge of the subject with multiple choice questions.

Welcome to your Power Electronics  MCQ practice assessment.

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In a SCR circuit, the angle of conduction can be changed by changing

When a UJT is used for triggering of an SCR, the waveshape of the voltage is a

Which of the following conditions is necessary for triggering system for thyristors?

For thyristors, pulse triggering is preferred to triggering because

The device which cannot be triggered by voltage of either polarity is

Equalising circuits are provided across each SCR in series operation to pro- vide uniform

UJT oscillators are used for gate-triggering of thyristors for

With gate open, a SCR can be turned-on by making supply voltage

In a GTO, anode current begins to fall when gate current

Thyristor A has rated gate current of 2 A and thyristor B is a rated gate current of 100 mA

The uncontrolled electronic switch employed in power-electronic converters is

Which of the following PNPN devices does not have a gate terminal?

If gate current is increased, the anode-cathode voltage at which SCR closes is

The normal way to close a SCR is by

In series connection, thyristor having the highest leakage resistance or low voltage current will share

A device that does not exhibit negative resistance characteristic is

Power MOSFET is a

A conducting SCR can be opened by reducing __________ to zero.

It is recommended to use UJT oscillator for gate-triggering of the thyristors mainly because

In a GTO, anode current begins to fall when gate current

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