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POWER ELECTRONICS

Power Electronics
The turn-on time of an SCR with inductive load is 20 µs. The puls train frequency is 2.5 KHz with a mark/space ratio of 1/10, then SCR will

 Turn on if pulse frequency us increased to two times.
  Turn on.
 Turn on if inductance is removed.
 Not turn on.

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Power Electronics
A power MOSFET has three terminals called

  Drain, source and gate.
 Drain, source and base.
 Collector, emitter and base.
 Collector, emitter and gate.

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

 MCT.
 FCT.
  IGBT.
 GTO.

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

 Microwave transistor.
 BJT.
  Power MOSFET.
 Schottky diode.

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Power Electronics
Thermal voltage VT can be given by

 qT/K.
 KT/q.
  Kq/T.
 (K2/q)(T + 1/T - 1).

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