POWER ELECTRONICS QUIZ

Which of following is not a power transistor?

IGBTs.

SITS.

TRIAC.

COOLMOS.

TRUE ANSWER : ?
YOUR ANSWER : ?

A GTO can be turned on by applying

Positive gate signal.

Positive drain signal.

None of these.

Positive source signal.

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YOUR ANSWER : ?

When the temperature increases, the intrinsic stand off ratio ___________.

Decreases

None of these

Essentially remains the same

Increases

TRUE ANSWER : ?
YOUR ANSWER : ?

How can we protect SCR from thermal conditions ?

Use of snubber circuit.

Using equalizing circuit.

Using CB and fuse.

Using heat sink.

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YOUR ANSWER : ?

Light triggering mainly used in

low - voltage direct current transmission.

high voltage direct current transmission.

medium voltage direct current transmission.

all of these.

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YOUR ANSWER : ?

COOLMOS device can be used in application up to power range of

2 KVA.

100 KVA.

500 VA.

1 KVA.

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Typical range of thyristor turn OFF time is

3 - 100 µs.

3 - 10 µs.

3 - 500 µs.

3 - 50 µs.

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YOUR ANSWER : ?

SCRs are used in series to meet

low voltage demand.

high voltage demand.

high current demand.

low current demand.

TRUE ANSWER : ?
YOUR ANSWER : ?

During which time maximum conduction spreading take place in the thyristor during turn ON?

Rise time.

Delay time.

Spread time.

Same for every case.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which statement is true for latching current ?

It is related to turn on process of the device.

It is related to turn off process of the device.

Both C and D.

It is related to conduction process of device.

TRUE ANSWER : ?
YOUR ANSWER : ?

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