Question

What is an electromagnet? Describe the construction and working of an electromagnet with the help of a labelled diagram.

Answer 1

 Electromagnet:
It is a magnet that works on the principle of magnetic effect of current.
A temporary magnet consisting of a long coil of insulated copper wire wrapped around a soft iron core is called an electromagnet. 

Construction and working: 

  

We take a rod NS of soft iron and wind coil C of insulated copper wire around it. When we connect the two ends of the copper coil to a battery, an electromagnet is formed. The iron rod inside the coil becomes a strong electromagnet on passing a current. The magnetic field produced by an electromagnet is very strong.