State Flemings left-hand rule.

(a) State Fleming’s left hand rule.

(b) Write the principle of working of an electric motor.

(c) Explain the function of the following parts of an electric motor.

(i) Armature (ii) Brushes (iii) Split ring

In an electric motor, which of the following remains fixed and which rotates with the coil?

Commutator; Brush

An electric motor is a device which transforms:

Name four appliances wherein an electric motor, a rotating device that converts electrical energy to mechanical energy, is used as an important component. In what respect motors are different from generators?

In an electric motor, the direction of current in the coil changes once in each:

State whether the following statement is true or false:

An electric motor converts mechanical energy into electrical energy.

Fill in the following blanks with suitable words:

(a) Fleming's Rule for the motor effect uses the ............... hand.

(b) A motor contains a kind of switch called a ............ which reverses the current every half ............ .

Name one device which works on the magnetic effect of current.

Of what substance are the brushes of an electric motor made ?