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Power Electronics

Power Electronics
Under over voltage condition impedance offered by the voltage clamping device is

 high.
  low.
 moderate.
 infinity.

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Power Electronics
The typical value of SCR for modern alternator is

 1.5.
 1.0.
 1.2.
 0.5.

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Power Electronics
Between the peak point and the valley point of UJT emitter characteristics we have ___________ region

Negative resistance
Cut-off
Saturation
None of these

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Power Electronics
Calculate the maximum voltage that can be safely blocked by the string shown in figure, if maximum allowable leakage current is 2 mA?

 6 KV.
 2 KV.
 10 KV.
  8 KV.

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

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

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