DC Motor Working

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.

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 :

With the help of a neat diagram , explain the constructure and working of a D.C . Motor.

Describe the principle, construction and working of a DC motor with the help of a diagram.

The back emf in a DC motor is maximum when,