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Power Electronics

Power Electronics
The triac is ___________.

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

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Power Electronics
Why resistor is used in Snubber circuit ?

 To minimize the charging current.
  To minimize the discharging current.
 To minimize the loss .
 All of these.

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

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

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

  10 mA.
 23 mA.
 40 mA.
 60 mA.

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Power Electronics
Light triggering mainly used in

  all of these.
  high voltage direct current transmission.
 low - voltage direct current transmission.
 medium voltage direct current transmission.

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Power Electronics
A power MOSFET has three terminals called

  Drain, source and gate.
 Collector, emitter and base.
 Collector, emitter and gate.
 Drain, source and base.

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