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Power Electronics

Power Electronics
A UJT is sometimes called ___________ diode.

High resistance
Low resistance
Single-base
Double-base

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Power Electronics
Which of following is not a power transistor?

 COOLMOS.
 SITS.
 IGBTs.
  TRIAC.

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Power Electronics
Which statement is true for latching current ?

 It is related to conduction process of device.
 It is related to turn off process of the device.
 Both C and D.
  It is related to turn on process of the device.

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Power Electronics
Power electronics essentially deals with control of a.c. power at ___________.

Frequencies above 20 kHz
50 Hz frequency
Frequencies above 1000 kHz
Frequencies less than 10 Hz

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Power Electronics
The typical value of SCR for modern alternator is

 1.5.
 1.0.
 1.2.
 0.5.

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Power Electronics
Thyristor is nothing but a

  Controlled switch.
 Amplifier with higher gain.
 Controlled transistor.
 Amplifier with large current gain.

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