Exercise: Power Electronics

Questions for: Power Electronics

Assertion (A): SUS is a PUT and avalanche diode connected between gate and cathode

Reason (R): SBS has two SUS inbuilt together and connected in anti-parallel

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: B
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If we connect two silicon unilateral switches in anti- parallel we get
A:
SCR
B:
SBS
C:
SCS
D:
UJT
Answer: B
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In rectifier circuits, ripple factor RF and form factor FF are related as
A:
RF = (FF2 - 1)0.5
B:
RF = FF
C:
RF = FF - 1
D:
RF = (FF - 1)0.5
Answer: A
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A dc chopper feeds an RLE load and has a duty cycle of 1. The load current will be such that
A:
B:
Imax > Imin
C:
Imin > 0
D:
Imin < 0
Answer: A
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A UJT exhibits negative resistance characteristics when
A:
Current is less than valley current
B:
Current is less than peak current
C:
Current is more than peak current but less than valley current
D:
None of the above
Answer: C
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