1.

(a) What is an armature ? What its advantage ? (b) What are the advantage of electromagnet over permanemt magnet ?

Answer»

Solution :The soft iron core, on which the coil is wound plus the COILS is called an armature. It is used in electric motors to act as an electromagent
The armature enhances the power of the motor
(ii) The advantages are
You can TURN the electromagnet by switching ON or OFF the current
You can reverse the POLES of the electromagent by REVERSING the direction electric current flow in the coil
The magnetic field strength can be changed by changing the amount of current in the coil.
An electromagnet can easily be made more POWERFUL than a permanent magnet


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