Electronics and Communication Engineering - Power Electronics

11. 

The commutation method in an inverter, is

A. line commutation
B. forced commutation
C. either (a) or (b)
D. none of the above

Answer: Option C

Explanation:

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12. 

Inverters find applications in

A. HVDC transmission
B. UPS
C. variable speed ac drives
D. all of the above

Answer: Option D

Explanation:

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13. 

When a thyristor is conducting, the voltage drop across it is about

A. 1 V
B. 10 V
C. 100 V
D. 0.1 V

Answer: Option A

Explanation:

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14. 

The use of free wheeling diode in controlled rectifier improves the waveshape of load current.

A. True
B. False

Answer: Option A

Explanation:

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15. 

As the firing of a thyristor is delayed, the output voltage of a controlled rectifier decreases.

A. True
B. False

Answer: Option A

Explanation:

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