Question

what are the methods of magnatisation

Answer 1

Answer:

hope this is the answer you are searching for

Explanation:

Magnetic Induction is one of the ways making magnetic materials like steel and iron into magnets. In other words, magnetic induction is a process of inducing magnetism in an ordinary piece of magnetic material.

This method involves simply placing the magnetic material (soft iron) close to a strong magnet without touching.

The soft iron bar becomes an induced magnet with the end nearer the magnet having opposite polarity to that of the magnet.

Hence, the soft iron bar is attracted and attached to the permanent magnet. Magnetic induction process reveals how magnetic materials can be attracted to magnets.

Induced magnetism is a temporary process. If the permanent magnet is removed, the magnetic material will usually lose its induced magnetism.

Electrical method for magnetisation

For magnetization, a direct current flowing into a solenoid (a long insulated wire coiled into a cylinder) produces a magnetic field that, inside the coil, is uniform in strength and direction.

The solenoid becomes a magnet.

A steel bar placed inside the coil for a short while becomes magnetised due to magnetic induction from the solenoid.

The polarities of the magnet depend on the direction of current flow.

Magnetisation by electric current method creates more powerful magnets than other magnetization methods such as stroking.

Answer 2

Answer:

Stroking method

A bar of steel can be magnetised by stroking it with a bar magnet. The domains become aligned, and a N pole and a S pole are induced.

Hammering

If a steel bar is placed so that it lies in the direction of the magnetic field lines of a strong magnet and then hammered gently, the domains will begin to line up in the direction of the field. As they do, the steel bar itself becomes magnetised. The effect can be increased by slightly heating the steel bar first.

Electrical method

A bar of steel or iron can be magnetised by placing it in a coil of wire (solenoid). Passing a d.c. (direct current) through the wire will magnetise the bar.