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Power Electronics

Power Electronics
A thyristor will be triggered when Vg = 1.5 volt and Ig = 100 mA in the given figure. Calculate the value of R in ohm is

 3.714.
  37.14.
 65.
 60.

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Power Electronics
Typical range of thyristor turn OFF time is

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

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Power Electronics
By which one of the following we can measure the reliability of a string?

 Reliability factor.
 String efficient.
  Derating factor.
 Factor of safety.

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

  Power dioed.
 None of above.
 BJT.
 MOSFET.

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Power Electronics
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.

High
None of these
Extremely low
Low

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Power Electronics
In a P1N1P2N2 thyristor which layer is less doped ?

 P1.
 N2.
  N1.
 P2.

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