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Power Electronics

Power Electronics
Which semiconductor device acts like a diode and two transistor?

 SCR.
 Diac.
 UJT.
  Triac.

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Power Electronics
Example of a voltage clamping device

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

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Power Electronics
After proper turn on of thyristor

None of these
 gate signal should present but can be removed.
  gate signal must be removed.
 gate signal is always present.

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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
A triac is a ___________ switch

Unidirectional
Mechanical
None of these
Bidirectional

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

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

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