Electronics and Communication Engineering - Power Electronics

21. 

The total number of leads in SUS, SBS and SCS respectively are

A. 3, 3, 4,
B. 3, 3, 3
C. 2, 3, 3
D. 3, 3, 5

Answer: Option A

Explanation:

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22. 

Which of these devices can conduct in both directions?

A. SCR
B. SUS
C. SBS
D. UJT

Answer: Option C

Explanation:

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23. 

Assertion (A): A half wave controlled rectifier has poorer efficiency and higher ripple factor than a full wave controlled rectifier.

Reason (R): The use of a freewheeling diode in half wave controlled rectifier circuit improves the waveform of load current and circuit power factor.

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:

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24. 

A 3 phase dual converter consists of

A. two 3 phase semiconverters connected in parallel
B. two 3 phase semiconverters connected in antiparallel
C. two 3 phase full converters connected in antiparallel
D. two 3 phase full converters connected in parallel

Answer: Option C

Explanation:

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25. 

Which inverter circuit uses coupled inductors?

A. Modified McMurray full bridge inverter
B. McMurray Bedford half bridge inverter
C. Modified McMurray Bedford half bridge inverter
D. Both (b) and (c)

Answer: Option D

Explanation:

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