Magnetism Physics Grade Eleven

Vocabulary flashcards covering the fundamental properties of magnets, types of magnetic materials, methods of magnetization, and the principles of electromagnetism as presented by Mr. Chisengah.

Magnet

A substance which when suspended freely to the string rest pointing to the north and south direction and it has the ability to attract other magnetic materials.

Magnetic Materials

Materials which are attracted by the magnet, such as Iron, Steel, Nickel, and Cobalt.

Non-Magnetic Materials

Materials that are not attracted by the magnet, such as Plastic, Glasses, Rubber, Copper, and Wood.

Permanent Magnet

Also called a hard magnet, it is one that does not easily get magnetised but retains magnetism.

Steel

An alloy of zinc and iron that is the most suitable material for making permanent magnets.

Temporal Magnet

Also called a soft magnet, it is one that easily gets magnetised but does not retain magnetism for a long time.

Iron

The most suitable material for constructing the core of an electromagnet because it easily gets magnetised but loses magnetism easily.

Soft Iron Keepers

Components that help magnets retain their magnetism for longer by providing a low reluctance path for the magnetic flux and minimising the loss of magnetism.

Magnetic Field

The area around the magnet where the force of attraction or repulsion is experienced.

Electric Field

The region around the electric charge where the force of attraction or repulsion is experienced.

Neutral Point

A location where two diferent magnetic fields are equal in magnitude and opposite in direction resulting in a net field strength of zero.

Strocking Method

A method where an object can be temporarily magnetised by stroking it many times in one direction with one of the poles of a bar magnet.

Single Strocking Method

A method where one pole of the magnet is strocked along a steel bar from one end repeatedly, though it has the disadvantage of magnetism becoming concentrated at one end.

Double Strocking Method

A method where an iron bar is magnetised by strocking it with two opposite poles of two bar magnets at the same time.

Consequent Poles

Poles that are produced from the double touch stroking method where the end poles of the bar become opposite.

Solenoid

A long coiled wire with many turns connected to a $6-12\,V$ direct current supply used to magnetise material placed inside.

Electromagnetism

A process where a magnetic field is created by introducing current in the conductor.