Question

You are required to make an electromagnet from a
soft iron bar by using a cell, an insulated coil of copper
wire and a switch. (a) Draw a circuit diagram to
represent the process. (b) Label the poles of the
electromagnet.​

Answer 1

Explanation:

Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail. In some cases, the nail will remain magnetised even when removed from within the wire coil.