GEOLOGY

Detailed explanation-1: -The major difference between an electromagnet and a permanent magnet is that the former can have a magnetic field when electric current flows through it and disappears when the flow of the current stops.

Detailed explanation-2: -The polarity of an electromagnet can be changed by changing the direction of electric current through it.

Detailed explanation-3: -What will change is your magnet’s polarity. One end of your magnet will be its north pole and the other end will be its south pole. Reversing the way the battery is connected will reverse the poles of your electromagnet. The more turns of wire your magnet has, the better.

Detailed explanation-4: -The distinction between the permanent magnet and the electromagnet is the strength and magnetic field. In Electromagnet, a wire-wound coil produces the magnetic field, but the Permanent (Bar) Magnet magnetic field can not be modified.