What will happen if the back e.m.f. of a D.C. motor vanishes suddenly?
A)The motor will stop
B)The motor will continue to run
C)The armature may burn
D)The motor will run noisy

Question

Quizplus · Accepted Answer

When the back e.m.f. (Electromotive Force) of a DC motor vanishes suddenly, it leads to a large increase in the armature current because the back e.m.f. acts against the supply voltage and limits the current through the armature. Without it, the only limit to the armature current is the armature resistance, which is typically low. This sudden increase in current can cause excessive heating, potentially burning the armature.

What Will Happen If the Back E