Edexcel GCSE Combined Science CP12 and CP13 Magnetism overview quiz quiz

A material that becomes magnetic only when it is placed inside another magnetic field

A coil of wire that produces a field only while a current is flowing through it

A magnet that produces its own magnetic field all the time

A magnet that has only a single pole instead of a north and a south pole

They attract

Nothing happens

They join permanently

They repel

From north to south

From south to north

In a circle

There is no direction

A magnet that is always magnetic and produces its own field at all times

A material that becomes magnetic only in a magnetic field and loses it when removed

A permanent bar magnet that always keeps its full magnetism even when no other field is present

A coil of wire that carries no current yet still behaves as a strong magnet

Straight parallel lines running along the length of the wire

A square grid pattern of field lines surrounding the wire

Circular (concentric) lines around the wire

There is no magnetic field at all around a straight wire

It uses much less wire than a single straight conductor would need

It removes the need for any current to flow through the coil at all

It turns the soft iron core into a permanent magnet that never switches itself off again

The fields of the many turns add together to make a stronger, more uniform field

Increase the current, add more turns, or add an iron core

Decrease the current flowing through the turns of the coil

Use fewer turns of wire so the field lines are more spread out

Remove the soft iron core from the centre of the solenoid

The heating effect produced when a current flows through a thin wire

The force on a current-carrying wire placed in a magnetic field

The induction of a voltage in a coil when the magnetic field changes

The attraction between two separate permanent bar magnets at a distance

Decrease the current flowing through the wire in the magnetic field

Remove the magnet so there is no longer any magnetic field present

Increase the current or the strength of the magnetic field

Use a thinner wire only, keeping the current and field the same

By increasing the size of the current flowing through the wire

By using a longer length of wire inside the magnetic field

It cannot be reversed once the current has started flowing

By reversing the current or reversing the magnetic field

Producing a potential difference when a conductor and a magnetic field move relative to each other

Making a permanent magnet by stroking a steel bar over and over again with one pole of another bar magnet

The force experienced by a current-carrying wire when it is placed inside a magnetic field

Heating a coil of wire by passing a large electric current through its many turns

Copper

Iron

Plastic

Wood