Electronics and Communication Engineering - Power Electronics

46. 

A current source inverter has simple commutation circuit.

A. True
B. False

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

47. 

In load commutated chopper, the commutating element

A. is capacitor
B. is capacitor and inductor
C. is capacitor, inductor and auxiliary thyristor
D. any of the above depending on load

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

48. 

In a half bridge inverter each thyristor is gated at a frequency f. The output frequency is

A. 2 f
B. f
C. 0.5 f
D. 0.25 f

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

49. 

Assertion (A): A transistor has lower voltage drop during conduction as compared to thyristor

Reason (R): Transistors are manufactured in very high voltage and current ratings.

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

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

50. 

Assertion (A): Typical value of thermal resistance from source to sink of an SCR is about 0.3° C/W

Reason (R): Heat sinks of thyristors are generally made of aluminium.

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

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

« Prev   1 2 3 4 5 6 7 8 9 10