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 (Solved)
1. a resistance is connected in series with armature
2. a resistance is connected parallel to the armature
3. armature is temporarily open circuited
4. a high value resistor is connected across the field winding
- a. a resistance is connected in series with armature