Answer :

(a) Electromagnet is a device which is used to generate magnetism when electric current is passed through it. It can be made by winding conducting wire around the core.

Uses:


1. In magnetic latches


2. Used in cranes for lifting metallic objects


(b)



(c) Soft iron core is used in electromagnet to increase its magnetic strength.


(d) The strength of the electromagnet can be increased by:


1. Increase the number of turns of the coil.


2. By increasing the magnitude of current.


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