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.

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

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

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

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

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

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

Optocouplers combine

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

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

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

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

As compared to UJT, SUS

In a UJT, maximum value of charging resistance is associated with

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

UJT oscillators are used for gate-triggering of thyristors for

For thyristors, pulse triggering is preferred to triggering because

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

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

The normal way to close a SCR is by