Power Electronics
In reverse blocking mode of a thyristor

  junction J1, J3 is in reverse bias and J2 is in forward bias.
 junction J1 and J2 is in forward bias and J3 is in reverse bias.
 junction J3 is in forward bias and J1, J2 in reverse bias.
 junction J2 is in reverse bias and J1, J3 is in forward bias.

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Power Electronics
Maximum di / dt in a SCR is

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

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