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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

 60.
 3.714.
  37.14.
 65.

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Power Electronics
Which semiconductor device acts like a diode and two transistor?

 SCR.
  Triac.
 Diac.
 UJT.

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Power Electronics
COOLMOS device can be used in application up to power range of

 1 KVA.
 500 VA.
  2 KVA.
 100 KVA.

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Power Electronics
Which triggering is the most reliable?

  Thermal triggering.
  Forward voltage triggering.
  Gate triggering.
  dV / dt triggering.

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Power Electronics
The typical time of rising time lies between

 10 - 20 µs.
  1 - 4 µs.
 90 - 100 µs.
 40 - 60 µs.

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Power Electronics
During which time maximum conduction spreading take place in the thyristor during turn ON?

 Rise time.
  Spread time.
 Delay time.
 Same for every case.

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