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Power Electronics

Power Electronics
A triac is equivalent to two SCRs ___________.

None of these
In parallel
In inverse-parallel
In series

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Power Electronics
Anode current in an SCR consists of

  electrons only.
  Both electron and holes.
  either electron or holes.
  holes only.

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Power Electronics
Latching current for an SCR inserted between a dc voltage source of 200 V and load is 100 mA. Compute the minimum rate of width pulse required to turn ON the SCR in case load consists of R = 20 Ω in series with L = 0.2 H.

 300 µs.
  100 µs.
 200 µs.
 150 µs.

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Power Electronics
Calculate the maximum voltage that can be safely blocked by the string shown in figure, if maximum allowable leakage current is 2 mA?

 2 KV.
 10 KV.
 6 KV.
  8 KV.

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Power Electronics
A power MOSFET has three terminals called

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

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Power Electronics
A thyristor can termed as

 Square wave switch.
 AC switch.
  DC switch.
 Both a and B.

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