If the carbon brushes of a working DC motor lose proper contact with the split-ring
PHYSICS · Single correct · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current
Problem
If the carbon brushes of a working DC motor lose proper contact with the split-ring, which immediate observation is most likely?
(a) The motor will speed up because friction is reduced.
(b) The motor will stop because current in the coil ceases.
(c) The motor will start running in the opposite direction.
(d) The motor will convert into an AC generator and light the battery.