| 1. |
Write the principle of working of an electric motor. Explain the function of Armature. |
|
Answer» ong>Answer: An electric MOTOR works on the principle that when a rectangular coil is placed in a magnetic field and current is passed through it, a force acts on the coil which rotates it continuously. It is based on Fleming's left hand RULE. (c ) (i) Armature . It is the rotating part of a motor. ⟹ Principle of WORKING of electric motor: A coil carrying electric current placed in an EXTERNAL magnetic field experiences a force. ⟹ Function of armature: Enhances the power of the motor and induces motion. ⟹ Function of BRUSHES: Helps easy transfer of charge between the coil and the external circuit. ⟹ Function of split rings: Reverses the direction of current after each half rotation of the coil so that the coil can keep rotating continuously. |
|