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Power Electronics

Power Electronics
To turn on UJT, the forward bias on the emitter diode should be ___________ the peak point voltage.

Equal to
None of these
More than
Less than

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Power Electronics
Anode current in an SCR consists of

  either electron or holes.
  holes only.
  Both electron and holes.
  electrons only.

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Power Electronics
What may happen high dV / dt?

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

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Power Electronics
After proper turn on of thyristor

 gate signal is always present.
None of these
 gate signal should present but can be removed.
  gate signal must be removed.

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Power Electronics
The device that exhibits negative resistance region is ___________.

Diac
UJT
Transistor
Triac

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Power Electronics
Gate circuit or triggering circuit of a thyristor is

  lower power circuit.
 may be low power or high power circuit.
 high power circuit.
 magnetic circuit.

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