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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.

Less than
Equal to
None of these
More than

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Power Electronics
A diac is ___________ switch

A d.c.
A mechanical
None of these
An c.

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Power Electronics
In a P1N1P2N2 thyristor which layer is less doped ?

 N2.
 P1.
 P2.
  N1.

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Power Electronics
BCT is used for

 Low power phase control.
 High power current control.
  High power phase control.
 Low power current control.

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Power Electronics
In a UJT, the p-type emitter is ___________ doped

Heavily
Moderately
Lightly
None of these

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Power Electronics
How can we protect SCR from thermal conditions ?

  Using heat sink.
 Using equalizing circuit.
 Using CB and fuse.
 Use of snubber circuit.

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