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Power Electronics

Power Electronics
The normal way to turn on a diac is by ___________.

Breakover voltage
Gate voltage
None of these
Gate current

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Power Electronics
If the anode current is 800 A, then the amount of current required to turn off the GTO is about

 400 A.
 600 A.
 20 A.
  200 A.

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Power Electronics
A power semiconductor may undergo damage due to

 Low dv/dt.
  High di/dt.
 High dv/dt.
 Low di/dt.

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Power Electronics
Which of the following is disadvantage of fast recovery diodes?

 Recovery is only 50 µs.
 None of these.
 Recovery is only 5 µs.
  Doping is carried out.

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Power Electronics
Which semiconductor device acts like a diode and two transistor?

  Triac.
 SCR.
 UJT.
 Diac.

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Power Electronics
A thyristor can termed as

 AC switch.
  DC switch.
 Both a and B.
 Square wave switch.

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