Power Electronics
Anode current in an SCR consists of

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

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Power Electronics
Rise time is defined by the interval when

  both B and C.
 gate current rises from 90 % to 100 % of it final value.
 anode voltage drops from 90 % to 10 % of its initial value.
 anode current rises 10 % to 90 % of its final value.

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