Power Electronics
Light triggering mainly used in

 low - voltage direct current transmission.
  all of these.
  high voltage direct current transmission.
 medium voltage direct current transmission.

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Power Electronics
SCR will be turned off when anode current is

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

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Power Electronics
Dynamic equalizing circuit is used for

 equal division of current through each thyristor in series.
 equal division of current through each thyristor in parallel.
  equal division of voltage across each thyristor.
 equal division of voltage across each thyristor in parallel.

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

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

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