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Power Electronics

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

 MOSFET.
  Power dioed.
 BJT.
 None of above.

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Power Electronics
A power semiconductor may undergo damage due to

 High dv/dt.
 Low dv/dt.
  High di/dt.
 Low di/dt.

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Power Electronics
A power MOSFET has three terminals called

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

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Power Electronics
A 200 A thyristor is to be operated in parallel with a 300 A thyristor. The ON state voltage drops are 1.5 V and 1.2 Volts. What is the value of resistance R to be connected in series with each thyristor, so that current through the combination is 500 A and each of them is fully loaded ?

 0.03 ohm
 3.0 ohm
  0.3 ohm
 0.3 ohm

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Power Electronics
Which triggering is the most reliable?

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

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Power Electronics
If a latching current for the circuit shown in figure is 2 mA. Obtain the value of minimum width of the property turn ON the SCR?

 3.1 µs
  3.3 µs
 3 µs.
 3.2 µs

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