Electronics and Communication Engineering - Power Electronics

6. 

In a half bridge inverter the gate pulses of the two thyristors have a phase displacement of

A. 60°
B. 90°
C. 120°
D. 180°

Answer: Option D

Explanation:

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7. 

A fully controlled bridge converter can operate in quadrants

A. 1
B. 1 and 2
C. 1 and 3
D. 1 and 4

Answer: Option D

Explanation:

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8. 

A class E chopper

A. can operate in second quadrant only
B. can operate in first or third quadrant
C. can operate in all the four quadrants
D. can operate in either second or third quadrant

Answer: Option C

Explanation:

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9. 

A cycloconverter uses

A. natural commutation
B. forced commutation
C. either natural or forced commutation
D. both natural and forced commutation together

Answer: Option C

Explanation:

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10. 

Assertion (A): A fully controlled bridge converter can operate in first and fourth quadrant.

Reason (R): A semi converter is cheaper than a full converter.

A. Both A and R are correct and R is correct explanation of A
B. Both A and R correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

Answer: Option B

Explanation:

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