Electronics and Communication Engineering - Power Electronics

6. 

A crowbar circuit is generally needed for protection under fault conditions.

A. True
B. False

Answer: Option A

Explanation:

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7. 

Forward rating of an SCR is

A. the maximum rate of rise of anode voltage which will trigger the SCR
B. the maximum rate of rise of anode voltage which will not trigger the SCR if gate signal is applied
C. the maximum rate of rise of anode voltage which will not trigger the SCR if gate signal is not applied
D. either (b) or (c)

Answer: Option C

Explanation:

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8. 

The number of leads in a DIAC are

A. 2
B. 3
C. 4
D. 6

Answer: Option A

Explanation:

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9. 

The condition for underdamped oscillations in a series RLC circuit is

A.
B.
C.
D.

Answer: Option B

Explanation:

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10. 

The method of triggering SCS is

A. application of positive pulse at cathode gate or negative pulse at anode gate
B. application of pulse at anode gate
C. application of pulse at cathode gate
D. application of low voltage at anode

Answer: Option A

Explanation:

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