Question

how the position of poles of the electromagnet can be changed​

Answer 1

Note the polarity of the coil before you turn off the power. Find the two wires that are attached to the electromagnet and disconnect them, using pliers or a screwdriver. Reverse the positions of the wires. When you turn on the power, the poles of the electromagnet will be reversed.

Answer 2

Answer:

Explanation:Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity.