Q
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____________________?
AA. A resistance is connected in series with armature
BB. A resistance is connected parallel to the armature
CC. Armature is temporarily open circuited
DD. A high value resistor is connected across the field winding
Correct Answer:
A. A. A resistance is connected in series with armature