Power Electronics
The reverse recovery time of diode is trr = 3 μs and the rate off all of the diode current is di/dt = 30 A/μs. The storage charge current QRR is

 140 μs.
 145 μs.
  135 μs.
 130 μs.

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Power Electronics
In forward blocking mode of a thyristor

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

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