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Power Electronics

Power Electronics
A diac is turned on by ___________.

None of these
Gate current
Gate voltage
A breakover voltage

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Power Electronics
A thyristor can termed as

 AC switch.
  DC switch.
 Both a and B.
 Square wave switch.

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Power Electronics
Snubber circuit is used with SCR

  in parallel.
 either series or parallel.
 anti parallel.
 in series.

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Power Electronics
Switching frequency of SITH is

  100 KHz.
 5 KHz.
 10 KHz.
 60 KHz.

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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.
 100 A.
  150 A.
 120 A.

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Power Electronics
Example of a voltage clamping device

 snubber circuit.
  metal oxide varistor.
 aluminium block.
 fast acting fuse.

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