Power Electronics
An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be

 2121.32 A.
 4242.64 A.
 1500 A.
 6000 A.

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Power Electronics
SCR will be turned off when anode current is

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

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