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EE8552_POWER ELECTRONICS UNIT 1_PART 2

Authored by Elavarasu Ramalingam

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EE8552_POWER ELECTRONICS UNIT 1_PART 2
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30 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

RC snubber circuit is used to limit the rate of

Rise of current in SCR

Rise of voltage across SCR

Conduction period

All of the above

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The thyristor is turned -off when the anode current falls below_____

Forward current

Latching current

Holding current

Breakover current

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a thyristor circuit, the angle of conduction is changed by changing______

Anode voltage

Gate current

Forward current

Anode current

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In AC voltage regulator, TRIACS cannot be used for a

Back emf load

Resistive load

R-L Load

Inductive load

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a thyristor

The holding current is greater than latching current

The two current are equal

The latching current is greater the holding current

None of the above

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a thyristor the ratio of latching current to holding current is

0.5

1

2.7

5

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a thyristor, dv/dt protection is achieved through the use of

L across thyristor

RC across thyristor

R across thyristor

RL across thyristor

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