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Power Electronics

Power Electronics
The device that exhibits negative resistance region is ___________.

UJT
Diac
Transistor
Triac

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Power Electronics
A Triac has three terminals viz ___________

None of these
Two main terminal and a gate terminal
Cathode, anode, gate
Drain, source, gate

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Power Electronics
Which of the following is used in heat sink?

 Silver.
 Carbon.
 Iron.
  Aluminium.

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Power Electronics
A triac is a ___________ switch

Unidirectional
None of these
Bidirectional
Mechanical

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Power Electronics
Power electronics essentially deals with control of a.c. power at ___________.

Frequencies above 1000 kHz
Frequencies above 20 kHz
50 Hz frequency
Frequencies less than 10 Hz

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Power Electronics
The latching current of GTO should be of order

  500 mA.
 100 mA.
 1 A.
 2 A.

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