Power Electronics
Light triggering mainly used in

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

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Power Electronics
In reverse blocking mode of a thyristor

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

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