As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit
A)a resistance is connected in series with armature
B)a resistance is connected parallel to the armature
C)armature is temporarily open circuited
D)a high value resistor is connected across the field winding

Question

Quizplus · Accepted Answer

A resistance is connected in series with the armature to limit the initial current. This is because the back electromotive force (EMF), which opposes the flow of current and is proportional to the motor's speed, is zero when the motor is not moving. Adding a resistance in series increases the total resistance of the circuit, thereby reducing the initial current to a safe level.

As There Is No Back E