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Power Electronics

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

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

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Power Electronics
Which following is a two terminal three layer device?

  Power dioed.
 MOSFET.
 BJT.
 None of above.

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Power Electronics
The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ___________ in its first quadrant

UJT
None of these
Transistor
SCR

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Power Electronics
Typical range of thyristor turn OFF time is

 3 - 50 µs.
 3 - 10 µs.
  3 - 100 µs.
 3 - 500 µs.

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

 GTO.
 MCT.
 FCT.
  IGBT.

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Power Electronics
Let of a thyristor Vc1, Vc2, Vc3 are forward break over voltage for gate current Ig1, Ig2, Ig3 respectively. Then

 Vc1 = Vc2 = Vc3 any value of Ig.
 Vc1 > Vc2 > Vc3 when Ig1= Ig2
 Vc1 > Vc2 > Vc3 when Ig1 > Ig2 > Ig3.
  Vc1 > Vc2 > Vc3 when Ig1 < Ig2 < Ig3.

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