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Power Electronics

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

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. Ten (10) 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.

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

Derating factors for parallel connection of thyristors are normally in the range

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

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

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

The uncontrolled electronic switch employed in power-electronic converters is

Which semiconductor power device out of the following is not a current trig- gered device?

For thyristors, pulse triggering is preferred to triggering because

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

A UJT has one base resistance of 5.2 k. Its intrinsic stand of ratio is 0.67. The inter-base voltage of 12 V is applied across the two passes. The value of base current will be

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

When transistors are used in series or parallel, a snubber circuit is used to

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

The normal way to close a SCR is by

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

In its application, an SUS behaves in the same way as

As compared to UJT, SUS

UJT oscillators are used for gate-triggering of thyristors for

The SCR is turned-off when the anode current falls below

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

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