Question

How will you make an iron bar electromagnet? Draw a diagram showing the polarities of an electromagnet.

Answer 1

Making an electromagnet:
In this method, an iron bar is placed inside a coil and an electric current is passed through the coil. After some time, the iron bar becomes a magnet. End A of the bar where the current enters the coil in clockwise direction becomes the south pole (S) and end B of the bar becomes the north pole (N).