The part of a magnet that is attracted to the south–seeking pole of another magnet, and to Earth's magnetic North Pole.

A material that is attracted to a magnet. The elements iron, cobalt and nickel, and their alloys (such as steel), are magnetic; non–metals and other metals are not magnetic.

A tiny magnet in a compass that freely turns to line up with the direction of a magnetic field.

A line with an arrow, showing the direction in which a force acts on the north–seeking pole of a magnet in a magnetic field.

Plotting magnetic fields

Physics

An electromagnet

Strength of an electromagnet

Applications of electromagnets

The motor effect

An electric motor

The generator effect

Electric generators

Applications of motor and generator effects

In the Magnets and electromagnets unit, pupils learnt about rules for magnets, magnetic fields of bar magnets, and the properties and uses of electromagnets. 

This unit explores magnetism, including permanent and induced magnets, magnetic fields, and Earth's magnetism. It covers current-induced magnetic effects, electric motors, and devices like microphones and loudspeakers, with an emphasis on models, calculations, and practical applications.

Electromagnetism

is an insulated wire wound into the shape of a spring.

is very pure iron that cannot be made into a permanent magnet.

describes the relationship between two variables, in which doubling the value of one variable doubles the value of the other.

show the uncertainty of each measurement on a graph.

An insulated wire wound into the shape of a spring.

Very pure iron that cannot be made into a permanent magnet.

Describes the relationship between two variables, in which doubling the value of one variable doubles the value of the other.

These show the accuracy of each measurement on a graph.

A magnet made by running current through a coil of wire round an iron core.

An electromagnet that loses its magnetism when current stops flowing through it.

A lock that can be opened with an electromagnet when a switch is closed.

A bell that uses an electromagnet to strike a clapper on the bell and which resets itself to keep ringing.

A motor that uses a magnetic field to produce a force.

has evenly spaced field lines and the strength of the magnetic field is the same everywhere

indicates the direction a conducting wire is forced to move in a uniform magnetic field

is a measure of the strength of a magnetic field

is the unit that magnetic flux density is measured in

is a material that does not conduct electric current

a coil of insulated wire that spins inside an electric motor when a current flows through it

a rod at the centre of wheels and gears around which they turn

in a motor kit, a U–shaped piece of iron that holds two magnets in place to create a uniform magnetic field

The current generated in a circuit moving relative to a magnetic field.

The effect of inducing a current by the relative movement of a circuit and a magnetic field.

A sensitive ammeter able to measure thousandths of an amp.

The potential difference generated in a conductor moving relative to a magnetic field.

An electric current that consistently flows in one direction.

An electric current that repeatedly reverses direction.

A piece of equipment that can display a representation of a sound wave.

The effect of causing movement between a magnet and an electromagnet.

A loudspeaker that produces sound using the motor effect.

A microphone that produces an electric signal from sound using the generator effect.

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Primary

Electromagnetism

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