Question

what is an elecronagnet ?
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Answer 1

Answer:

electromagnet, device consisting of a core of magnetic material surrounded by a coil through which an electric current is passed to magnetize the core. An electromagnet is used wherever controllable magnets are required, as in contrivances in which the magnetic flux is to be varied, reversed, or switched on and off.

Explanation:

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Answer 2

Answer:

The branch of physics that deals with the magnetic effect of electric current is called electromagnetism.

Explanation:

An electromagnet is a temporary magnet. When an electric current flows Through a conductor, it creates a magnetic field around the conductor and behaves like a magnet. This forms the basis of the electromagnetism. the term electromagnetism comes from the fact that electric and magnetic forces are linked together.

When a wire is wounded around a soft iron bar and electric current is passed thorugh the wire, the soft iron bar behaves like a magnet whose strength is much more than the magnetic effect produced by the wire alone. The magnetism of the soft iron bar is not permanent and is soon lost when the current is switched off. this shows that the soft iron behaves as a magnet only when the when the wire around it carries current. Hence, it is a temporary magnet. this kind of magnet is called an electromagnet.

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