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 resistance is connected in series with armature
Barmature is temporarily open circuited
Ca high value resistor is connected across the field winding
Da resistance is connected parallel to the armature
Correct answer
A. a resistance is connected in series with armature
Explanation
The correct answer is a resistance is connected in series with armature.