Electronics and Communication Engineering - Power Electronics

21. 

A single phase full bridge inverter for R-L loads needs

A. 4 thyristors
B. 4 thyristors and 4 diodes
C. 4 thyristors and 2 diodes
D. 8 thyristors

Answer: Option B

Explanation:

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

22. 

In the basic series inverter circuit, the source current has

A. low harmonic content
B. high harmonic content
C. low or high harmonic content depending on firing angle
D. zero harmonic content

Answer: Option B

Explanation:

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

23. 

Thyristors connected in series need static and dynamic stabilizing circuits.

A. True
B. False

Answer: Option A

Explanation:

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

24. 

In a controlled rectifier a freewheeling diode is necessary if the load is

A. inductive
B. resistive
C. capacitive
D. any of the above

Answer: Option A

Explanation:

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

25. 

For an illumination control circuit it is advisable to use a matched TRIAC-DIAC pair.

A. True
B. False

Answer: Option A

Explanation:

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