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Power Electronics

Power Electronics
The typical value of SCR for modern alternator is

 1.2.
 1.5.
 1.0.
 0.5.

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Power Electronics
Spread time is defined as the interval during which

 anode current rises from 10 % to 90 % of its final value.
 anode voltage drops from 10 % of its initial value to zero.
 both (A) and (B).
  anode current rises from 90 % to its final value.

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

None of these
Extremely low
High
Low

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Power Electronics
A diac has ___________ semiconductor layers

Three
None of these
Two
Four

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

 Equalizing circuit.
 Circuit breaker.
 Fuse.
  Snubber circuit.

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Power Electronics
Leakage current flows through the thyristor in

 forward conduction mode.
 reverse blocking mode.
 forward blocking mode.
  both forward and reverse blocking mode.

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