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Power Electronics

Power Electronics
The UJT may be used as ___________.

Am amplifier
A rectifier
A sawtooth generator
None of these

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Power Electronics
Which statement is true for latching current ?

 It is related to turn off process of the device.
 It is related to conduction process of device.
 Both C and D.
  It is related to turn on process of the device.

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

Diac
UJT
Transistor
Triac

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Power Electronics
Why resistor is used in Snubber circuit ?

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

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Power Electronics
A GTO can be turned on by applying

 Positive source signal.
 None of these.
 Positive drain signal.
  Positive gate signal.

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Power Electronics
CB used for over current protection of thyristor operates when the fault current is

 neither (A) nor (B).
 of short duration.
 both (A) and (B).
  of long period.

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