Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Electromagnets are made of soft iron. Reason R : Soft iron has high permeability and low retentivity. In the light of above statements, choose the most appropriate answer from the options given below.

Step-by-step solution

A coil surrounding a magnetic core having high permeability and low retentivity, through which an electric current is fed to magnetise the core is what makes up an electromagnet. Wherever controllable magnets are needed, as in devices where the magnetic flux needs to be adjusted, reversed, or turned on and off, an electromagnet is used. Hence, both A and R are correct and R is the correct explanation of A .