Question

what is electromagnet​

Answer 1

Explanation:

#What is Electromagnet?

Electromagnets are made out of a coil of wire (wire curled in series). This is more effective in producing a magnetic field than just a wire running straight. This effect can be strengthened by winding a wire tightly around a powerful core, made of magnetic material, such as iron. The picture above shows a coil wound around an iron nail. On its own, the iron nail is not magnetic.

#Properties of Magnet

A few properties of the magnet are as follows:

Attractive Property – Ferromagnetic materials like iron, nickel and cobalt are attracted by magnets

Repulsive Property – Like poles repel each other while unlike poles attract each other

Directive Property – A freely suspended magnet always points in the north-south direction

Working Principle of Electromagnets

So how do electromagnets work? Let’s consider the iron nail itself. Why does it not produce a magnetic field when not influenced by an electric field?

#Electromagnet

An iron nail made into a magnet by passing electric current through a coil surrounding it.

Normally, the atoms in the nail are oriented in random directions and individual magnetic fields cancel each other out. Under the influence of electric current, these atoms are reoriented to start pointing in the same direction. All these individual magnetic fields together create a strong magnetic field. As the current flow increases, this degree of reorientation also increases, resulting in a stronger magnetic field. Once all the particles are reoriented perfectly in the same direction, increasing current flow will not affect the magnetic field produced. At this point, the magnet is said to be saturated.

Answer 2

Answer:

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what is electromagnet?

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An electromagnet is a magnet that runs on electricity.

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.