Assertion (A): Chopper always requires forced commutation Reason (R): Morgan cho

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Question
Assertion (A): Chopper always requires forced commutation
Reason (R): Morgan chopper uses a saturable reactor.
Options
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

Correct Answer

Both A and R correct but R is not correct explanation of A

Power Electronics problems

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1. In the basic series inverter circuit, the source current has
Options
A. low harmonic content
B. high harmonic content
C. low or high harmonic content depending on firing angle
D. zero harmonic content

3. A single phase half wave rectifier is feeding a resistive load. As firing angle is increased
Options
A. dc output voltage and rms output voltage decrease in the same proportion
B. dc output voltage and rms output voltage decrease
C. dc output voltage and rms output voltage increase
D. dc output voltage and rms output voltage increase in the same proportion

7. A single phase half wave converter is feeding-a resistor load. The input voltage is v = V_m sin ?t. If firing angle is zero, the output dc voltage V_dc and output rms voltage V_rms respectively
Options
A.
B.
C.
D.

10. In a power diode the reverse recovery time is the time from the instant the forward current is zero to the instant when reverse recovery current has decayed to
Options
A. 50% of peak reverse current
B. 25% of peak reverse current
C. 10% of peak reverse current
D. zero value

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