Question

(e) State two ways to increase the speed rotation of a D.C. motor.
(i) By increasing the strength of current through the coil.
(ii) By increasing the number of turns in the coil.​

Answer 1

Answer:

Magnetic flux - By decreasing the flux, the speed of the motor can be increased. The flux can be changed by changing the current with a shunt field rheostat. Resistance of the armature circuit - By decreasing the resistance, there is increase in the armature current which causes a larger torque to be developed