Power Electronics
A power MOSFET has three terminals called

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

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Power Electronics
SCR will be turned off when anode current is

 < latching current but greater than holding current and gate signal is present.
  < latching current but greater than holding current and gate signal is 0.
  both (A) and (B).
 less than holding current.

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