P3 Magnets Revision

Which of the following are magnetic materials?

(You may select more than one answer)

• Iron

• Copper

• Steel

• Aluminium

Which of the following statements are true?

(You may select more than one answer)

• Like poles attract.

• Like poles repel.

• Unlike poles attract.

• Unlike poles repel.

Magnets A, B, C and D attracted a nail from different distances as shown:

Magnet A - Attracted nail from 10cm away

Magnet B - Attracted nail from 2cm away

Magnet C - Attracted nail from 5cm away

Magnet D - Attracted nail from 7cm away

Arrange the magnets in order, starting from the strongest magnet.

• A, D, C, B

• B, C, D, A

Label the two poles of the temporary magnet created by the stroking method as shown.

X: _____

Y: _____

• X: North

• X: South

• Y: North

• Y: South

Label the two poles of the temporary magnet created by the stroking method as shown.

X: _____

Y: _____

• X: North

• X: South

• Y: North

• Y: South

A bar magnet is broken as shown.

Label the poles of each part of the broken magnet.

• A is North, C is South, E is North, G is South

• A is South, C is North, E is South, G is North

• A is South, C is South, E is South, G is South

• A is North, C is North, E is North, G is North

Label the poles of the bar magnet correctly.

• A is South, B is North

• A is North, B is South

• A is East, B is West

• A is North, B is West

Which of the following statements is false?

• A freely-suspended magnet rests in the North-South direction.

• Magnetic strength does not depend on the size or shape of the magnet.

• Magnetic materials attract magnets.

• Magnetism is the strongest at the poles of a magnet.

The magnetism of a magnet can be weakened by _____________________.

(You may select more than one answer)

• stroking it many times with a permanent magnet

• hitting it repeatedly

• dropping it repeatedly

• heating it at high temperatures

Suggest 1 way we can increase the strength of an electromagnet.

Ans: By increasing the number of _____ around the electromagnet.