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Power Electronics

Power Electronics
Thermal voltage VT can be given by

 KT/q.
 (K2/q)(T + 1/T - 1).
 qT/K.
  Kq/T.

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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.
  200 A.
 20 A.

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Power Electronics
A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is

 30° to 180°.
 60° to 120°.
 60° to 180°.
 30° to 150°.

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Power Electronics
A Triac has three terminals viz ___________

Drain, source, gate
Two main terminal and a gate terminal
None of these
Cathode, anode, gate

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Power Electronics
The triac is ___________.

Like a bidirectional SCR
None of these
Not a thyristor
A four-terminal device

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Power Electronics
COOLMOS device can be used in application up to power range of

 500 VA.
  2 KVA.
 1 KVA.
 100 KVA.

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