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Power Electronics

Power Electronics
The typical value of SCR for modern alternator is

 0.5.
 1.5.
 1.0.
 1.2.

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Power Electronics
What happen due to high di / dt?

 Breakdown of junction.
 None of these.
  Local hot spot.
 Insulation failure.

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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
Why resistor is used in Snubber circuit ?

 All of these.
  To minimize the discharging current.
 To minimize the charging current.
 To minimize the loss .

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Power Electronics
Thyristor can be protected from over voltages by using

  voltage clamping device.
 snubber circuit.
 heat sink.
 fuse.

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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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