Electronics and Communication Engineering - Power Electronics

6. 

McMurrary full bridge inverter uses

A. auxiliary commutation
B. complementary commutation
C. natural commutation
D. any of the above

Answer: Option A

Explanation:

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7. 

A fully controlled bridge converter feeds a highly inductive load such that the load current can be assumed to be constant. The wave shape of input current is

A. dc
B. sinusoidal
C. rectangular
D. none of the above

Answer: Option C

Explanation:

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8. 

A static excitation system uses

A. transformer and thyristors
B. transformer and ac exciter
C. dc exciter and ac exciter
D. transformer and dc exciter

Answer: Option A

Explanation:

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9. 

The application of gate signal decreases the break over voltage of on SCR.

A. True
B. False

Answer: Option A

Explanation:

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10. 

The power factor at the input terminals of a cyclo- converter is generally

A. low and leading
B. low and lagging
C. high and leading
D. high and lagging

Answer: Option B

Explanation:

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