Question

how will you prove the magnetism of an electromagnet

Answer 1

we can do that by surrounding it by iron nails or iron dust. when the electromagnet is operating it will attract the nails or the dust and as soom as the electricity is switched off the electromagnet loses its magnetism and the iron nails arent attracted to it anymore.

Answer 2

Electric current flowing through a wire creates a magnetic field that attracts ferromagnetic objects, such as iron or steel, which is the principle behind electromagnets and magnetic levitation trains. It allows cranes to pick up whole cars in the junkyard and makes your doorbell ring. Suppose, a simple electromagnet consisting of a coil of wire wrapped around an iron core and a core of ferromagnetic material like iron serves to increase the magnetic field created.