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What is the reason behind short circuit in armature?

Posted: Thu Jul 14, 2022 1:11 pm
by answerhappygod
a) Insulation failure between two commutator bars
b) Insulation failure between two turns of a coil
c) Two or more turns of the same coil getting grounded
d) Insulation failure between two commutator bars, two turns of a coil or the same coil getting grounded