Question

during conduction of thyristor JI and j3 are forward biased but what about the j3

Answer 1

i think u ask us about j2?
@rajeevpandey
when anode is at positive potential w.r,t cathode with no voltage applied at the gate then j1 and j3 are forward biased but j2 are reverse biased

Answer 2

normally under this condition , there will be a small amount of leakage current in the j2 instead of being reverse biased , but the thing the energy is n't enough for them to jump across their band's.so there might be no conduction over there