Power Electronics
Practical way of obtaining static voltage equalization in series connected SCRs is by the use of

 one resistor across the string.
 one resistor in series with each SCR.
  resistors of the same value across each SCR.
 resistors of different values across each SCR.

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Power Electronics
Rise time is defined by the interval when

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

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