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Power Electronics

Power Electronics
A thyristor will be triggered when Vg = 1.5 volt and Ig = 100 mA in the given figure. Calculate the value of R in ohm is

 3.714.
 60.
 65.
  37.14.

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

  2 KVA.
 500 VA.
 1 KVA.
 100 KVA.

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Power Electronics
Example of a voltage clamping device

 aluminium block.
  metal oxide varistor.
 fast acting fuse.
 snubber circuit.

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Power Electronics
What may happen high dV / dt?

 Breakdown of J2 junction.
 Unwanted turn ON.
 Anyone of these.
  Both A and B.

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Power Electronics
Between the peak point and the valley point of UJT emitter characteristics we have ___________ region

None of these
Saturation
Negative resistance
Cut-off

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