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Power Electronics

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

Triac
Transistor
Diac
UJT

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Power Electronics
After peak point, the UJT operates in the ___________ region.

Saturation
None of these
Cut-off
Negative resistance

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Power Electronics
During reverse recovery time

  both B and C.
 charge carrier of junction J3 is swept out.
 charge carrier of junction J1 is swept out.
 charge carrier of junction J2 recombined.

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Power Electronics
A diac has ___________ pn junctions

Three
Four
None of these
Two

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Power Electronics
Figure shows two thyristors rated 400 A sharing a load current. Current through T2 is 180A. Current through T1 will be

 110 A.
 120 A.
  150 A.
 100 A.

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Power Electronics
The function of snubber circuit connected across the SCR is to

  suppress dV / dt.
 decrease dV / dt.
 decrease di / dt.
 increase dV / dt.

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