Power Electronics
Maximum di / dt in a SCR is

  directly proportional to Vm of supply voltage.
 inversely proportional to Vm of supply voltage.
 inversely proportional to L in the circuit.
 both A and C.

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Power Electronics
An SCR is considered to be a semi controlled device because

 it can be turned ON but not OFF with a gate pulse.
 it can be turned ON only during one half cycle of an AC.
 it conducts only during one half cycle of an alternating current wave.
 it can be turned OFF but not ON with a gate pulse.

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Power Electronics
During gate recovery time

  charge carriers of J2 junction recombined.
 charge carriers of J3 junction is removed.
 charge carriers of J2 junction is swept out.
 charge carrier of J1 junction removed.

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