With the help of a neat diagram , explain the constructure and working of a D.C . Motor.
Fuse || AC/DC || AC Generator Motor
In a D.C. motor, concave cylindrical magnets produce a____magnetic field.
What causes the rectangular coil in a D.C. motor to rotate? Explain.
State one point of similarity and one point of difference between an.AC. generator and a D.C. motor.
Why are magnets with concave shaped poles used in a D.C. motor? What happens if magnets with flat poles are used in it ?
D.C motor run of 120 V . If armature current at e_(b) = 115 V is 10 A . Then find out current just after motor is started :
Split rings are used in a DC generator an in an electric motor.
An electric motor operating on 50 volt D.C. supply draws a current of 10 amp. If the efficiency of motor is 40% then the resistance of the winding of the motor is
