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Power Electronics

Power Electronics
If holding current of a thyristor is 2 mA then latching current should be

 0.002 A.
 0.009 A.
  0.004 A.
 0.01 A.

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Power Electronics
Spread time is defined as the interval during which

 anode voltage drops from 10 % of its initial value to zero.
 anode current rises from 10 % to 90 % of its final value.
  anode current rises from 90 % to its final value.
 both (A) and (B).

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Power Electronics
SITH is also known as

 Silicon controlled rectifier.
 Filled controlled rectifier.
  Filled controlled diode.
 None of these.

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Power Electronics
A diac has ___________ semiconductor layers

Two
Three
None of these
Four

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Power Electronics
Which one is most suitable power device for high frequency (>100 KHz) switching application?

 BJT.
 Microwave transistor.
  Power MOSFET.
 Schottky diode.

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Power Electronics
The maximum di/dt in a SCR is

 Inversely proportional to supply voltage.
 Directly proportional to inductance in the circuit.
 Directly proportional to supply voltage.
  Both A and B.

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