Starters are used with D.C. motors because________?
Aback e.m.f. of these motors is zero initially
Bto restrict armature current as there is no back e.m.f. while starting
Cthese motors are not self-starting
Dthese motors have high starting torque
Correct answer
B. to restrict armature current as there is no back e.m.f. while starting
Explanation
The correct answer is to restrict armature current as there is no back e.m.f. while starting.