Awesome DC Motor Life Hacks[NEW]

A DC motor is rotating in clockwise direction. How can the direction of rotation be reversed?

5 Awesome Science experiments

The back emf in a DC motor is maximum when,

Split rings are used in a DC generator an in an electric motor.

when the speed of a dc motor increase the armature current

The power of a motor is 200W .If the unit of length is halved that of mass is doubled and that of time is also doubled the power of the motor in the new system is

One unit of power of a motor is 150 W at is in some system of unit. If the unit of force is doubled and unit of velocity trpled, then one new unit of power of motor is

The armature of a DC motor has 20Omega resistance. It draws a current of 1.5 A when run by 200 V DC supply The value of back emf induced in it will be

Armature current in dc motor will be maximum when