State the direction of the magnetic field inside the bar magnet.

Normally,a red colour cable is used for the live wire in domestic electrical circuits.

In an electric circuit,a fuse is used because $......$

You are given two identical-looking iron bars,out of which one of them is a magnet. Just using these two bars,how will you identify which one is a magnet?

$A$ coil made of insulated copper wire is connected to a galvanometer. What will happen to the deflection of the galvanometer if this coil is moved towards a stationary bar magnet and then moved away from it? Give reason for your answer and name the phenomenon involved.

Whenever the magnetic field through a coil is changed,a potential difference is produced in the coil.