Question

give reason why electromagnet is called a temporary magnet​

Answer 1

Answer:

When the battery is connected to the coil, current flows through it. In this way a magnetic field is generated. Iron has a high magnetic permeability, which enables it to reinforce the magnetic field generated by the wire.Thus, electromagnet is called a temporary magnet.

Answer 2

Answer:

Temporary magnets only retain their magnetism while near a permanent magnetic field or electric current. Thus, they require an external force to remain in its magnetised state. When the battery is connected to the coil, current flows through it. ... Thus, electromagnet is called a temporary magnet.