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Power Electronics

Power Electronics
A modern power semiconductor device that combines the characteristic of BJT and MOSFET is

 GTO.
  IGBT.
 MCT.
 FCT.

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Power Electronics
Which of following devices has highest di/dt and dv/dt capability?

  GTO.
 SCR.
 SITH.
 SIT.

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Power Electronics
Compared to transistor, ______________ have lower on state conduction losses and higher power handling capability

 MOSFETs.
 TRIACs.
 Semi conductor diodes.
  Thyristor.

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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 long period.
 both (A) and (B).
 of short duration.

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Power Electronics
How can we protect SCR from thermal conditions ?

  Using heat sink.
 Use of snubber circuit.
 Using equalizing circuit.
 Using CB and fuse.

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Power Electronics
The latching current of SCR is 20 mA. Its holding current will be

 23 mA.
  10 mA.
 40 mA.
 60 mA.

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