Electronics and Communication Engineering - Power Electronics

41. 

Which of these devices have four layers?

A. UJT
B. SCR
C. TRIAC
D. SCR and TRIAC

Answer: Option B

Explanation:

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42. 

When UJT is used for thyristor gate signal, the output of UJT is

A. sine wave
B. square wave
C. saw tooth wave
D. either (a) or (c)

Answer: Option C

Explanation:

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43. 

The stud in a stud mounted SCR acts as

A. anode
B. cathode
C. gate
D. anode or cathode

Answer: Option A

Explanation:

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44. 

In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.

A. True
B. False

Answer: Option A

Explanation:

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45. 

Half bridge and full bridge inverters of one type use different commutation methods.

A. True
B. False

Answer: Option B

Explanation:

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