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Power Electronics

Power Electronics
Switching frequency of SITH is

 5 KHz.
  100 KHz.
 10 KHz.
 60 KHz.

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Power Electronics
Snubber circuit is used with SCR

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

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Power Electronics
The maximum di/dt in a SCR is

  Both A and B.
 Inversely proportional to supply voltage.
 Directly proportional to supply voltage.
 Directly proportional to inductance in the circuit.

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Power Electronics
A diac is simply ___________.

A three junction device
A single junction device
A triac without gate terminal
None of these

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Power Electronics
Maximum power loss occurs during

 all.
 delay time.
 spread time.
  rise time.

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Power Electronics
Example of a voltage clamping device

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

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