GEOLOGY

Detailed explanation-1: -Soft iron is used to make the core in electromagnets because a soft iron core can be magnetized and demagnetized quickly. So, soft iron nail is best suited for making electromagnets.

Detailed explanation-2: -Iron is widely regarded as the best core for an electromagnet, but why? It isn’t the only magnetic material, and there are plenty of alloys such as steel that you might expect to be used more in the modern age.

Detailed explanation-3: -The more loops the coil has, the stronger the magnetic field, while the current is flowing. A magnet made from just a coil of wire isn’t very strong. But when you coil the wire around an iron nail, the magnetic domains inside the nail line up and make a strong, temporary magnet.

Detailed explanation-4: -Electromagnetism is a process in which when a iron nail is kept in a electric field then after some time it will show magnetism. Its magnetism will be lost as soon as the electric current is turned off. So, it is a temporary magnet.

Detailed explanation-5: -Key points. Iron is easily magnetised and demagnetised. Steel is more difficult to magnetise and is not easily demagnetised.