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Power Electronics

Power Electronics
Thyristor can be protected from over voltages by using

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

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Power Electronics
A single phase full bridge inverter can operate in load commutation mode in case load consists of

 RLC critically damped.
 RLC overdamped.
  RLC underdamped.
 RL.

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Power Electronics
Thyristor is nothing but a

  Controlled switch.
 Amplifier with higher gain.
 Amplifier with large current gain.
 Controlled transistor.

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Power Electronics
A power MOSFET has three terminals called

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

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Power Electronics
A triac is equivalent to two SCRs ___________.

In series
In inverse-parallel
In parallel
None of these

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

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

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