Electronics and Communication Engineering - Power Electronics

1. 

A chopper cannot be line commutated.

A. True
B. False

Answer: Option A

Explanation:

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2. 

Natural commutation can be used in :

A. DC circuits only
B. AC circuits only
C. both AC and DC circuits
D. none of the above

Answer: Option B

Explanation:

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3. 

In a thyristor the gate lead is connected to the n layer near the p layer to which anode is connected.

A. True
B. False

Answer: Option B

Explanation:

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4. 

A single phase half wave rectifier circuit has a free wheeling diode. The free wheeling diode will conduct only if

A. load is purely resistive
B. load is purely inductive
C. load is combination of R and L
D. load is purely inductive or combination of R and L

Answer: Option D

Explanation:

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5. 

McMurray Bedford full bridge inverter uses

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

Answer: Option C

Explanation:

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