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Power Electronics

Power Electronics
A triac is a ___________ switch

Bidirectional
Unidirectional
Mechanical
None of these

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Power Electronics
SCRs are used in series to meet

 low voltage demand.
  high voltage demand.
 low current demand.
 high current demand.

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Power Electronics
Thyristor can be protected from over voltages by using

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

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Power Electronics
The triac is ___________.

A four-terminal device
Like a bidirectional SCR
None of these
Not a thyristor

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Power Electronics
ON state voltage drop across SCR lie between the range

 0.5 - 1 V.
  1 - 1.5 V.
 1.5 - 2 V.
 0 - 0.5 V.

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Power Electronics
Typical range of thyristor turn OFF time is

 3 - 500 µs.
 3 - 10 µs.
 3 - 50 µs.
  3 - 100 µs.

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