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Power Electronics

Power Electronics
A diac has ___________ semiconductor layers

None of these
Four
Three
Two

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Power Electronics
4 thyristors rated 200 V in series. The operating voltage of the string is 0.600 V. Derating factor of the string is

 0.7.
 0.75.
  0.25.
 0.2.

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Power Electronics
The device that does not have the gate terminal is ___________.

SCR
FET
Triac
Diac

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Power Electronics
Which of the following is used in SCR to protect from high dV / dt?

 Circuit breaker.
 Equalizing circuit.
 Fuse.
  Snubber circuit.

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Power Electronics
The device that exhibits negative resistance region is ___________.

Triac
UJT
Diac
Transistor

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Power Electronics
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.

Extremely low
High
None of these
Low

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