Power Electronics
60 thyrsistors are connected in series and parallel to form a 10 KV and 5.5 KA switch. Each thyristor is rated for 1.2 KV, 1 KA. The no. of parallel path are 6. The efficiency of the switch is

 91.6 %.
 90.9 %.
  76.3 %.
 83.3 %.

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Power Electronics
During gate recovery time

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

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Power Electronics
SCR will be turned off when anode current is

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

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