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Power Electronics

Power Electronics
The latching current of SCR is 20 mA. Its holding current will be

 60 mA.
  10 mA.
 40 mA.
 23 mA.

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Power Electronics
A UJT has ___________.

One pn junction
Three pn junctions
None of these
Two pn junctions

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Power Electronics
What is used to protect the SCR from over current ?

 Heat sink.
 Snubber circuit.
  CB and fuse.
 Voltage clamping device.

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Power Electronics
Under normal operating condition voltage clamping device offers impedance of

 low value.
 zero value.
 moderate value.
  high value.

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

 100 KVA.
 500 VA.
  2 KVA.
 1 KVA.

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

UJT
Transistor
Triac
Diac

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