15 Magnetism 2023

Which metal could be used for a permanent magnet and which metal could be used for the core of an electromagnet?

A hard magnetic material can be used to make a permanent magnet.

A soft magnetic material can be used to make a temporary magnet.

Which row shows whether iron and steel are hard or soft magnetic materials?

Which metal can be attracted by a magnet?

• zinc

• lead

• iron

• copper

An unmagnetised piece of soft iron is placed close to a strong permanent magnet.

What is the induced polarity of end X of the soft iron and in which direction does the magnetic force act on the soft iron?

• N, to the left

• N, to the right

• S, to the left

• S, to the right

The magnetic field of a bar magnet can be represented by magnetic field lines.

Which diagram shows two magnetic field lines correctly?

Which row gives the metal used to make the core of an electromagnet and one property of the electromagnet?

Induced magnetism is best described as:

• The process by which a material becomes magnetic when placed near a magnet.

• The process of creating a permanent magnet from a non-magnetic material.

• The ability of a magnet to lose its magnetism over time.

• The process of breaking a magnet into smaller pieces.

State a difference between a magnetic property of the iron nails and of the steel nails after being left attached to a magnet for several hours and then removing the magnet.

• Iron nails lose their magnetism quickly, while steel nails retain their magnetism for a longer time.

• Steel nails lose their magnetism quickly, while iron nails retain their magnetism for a longer time.

• Both iron and steel nails retain their magnetism for the same amount of time.

• Neither iron nor steel nails become magnetised after being attached to a magnet.

A magnetic field is:

• a region where a magnetic force can be detected

• a type of electric current

• a form of visible light

• a region with no forces present

The direction of a magnetic field is defined as:

• the direction in which the north pole of a compass needle points

• the direction in which the south pole of a compass needle points

• perpendicular to the electric field

• opposite to the direction of current flow