Magnets

Question 1

What are the two poles on a magnet?

Answer 1

North and south poles

Question 2

What would happen if you put a north pole against a north pole?

Answer 2

The magnets would repel

Question 3

What would happen if you put a south pole against a north pole?

Answer 3

The magnets would attract

Question 4

What are the properties of magnetically hard materials?

Answer 4

1) Hard to magnetise

2) Do not easily lose their magnetism

Question 5

What are the properties of magnetically soft materials?

Answer 5

1) Easily magnetised

2) Easily lose their magnetism

Question 6

Why are permanent magnets made out of magnetically hard materials?

Answer 6

We do not want them to lose their magnetism. The domains present in the magnetically hard materials are aligned when they are put in a strong magnetic field and stay aligned even when they are taken out of the magnetic field unless great pressure is exerted on the material

Question 7

What rules do magnetic field lines obey?

Answer 7

1) They always go from north to south

2) They never overlap other field lines in the magnetic field

Question 8

Describe what happens when a magnetic material becomes induced

Answer 8

When a magnetic material is placed inside a strong magnetic field, it can be temporarily magnetised

Question 9

What is the difference in being magnetically hard or magnetically soft?

Answer 9

When the magnetic material that has been induced is removed from the magnetic field, it can lose its magnetism at different rates depending on whether it is magnetically hard or soft. If the material is magnetically soft then it would lose its magnetism quicker than if the material is magnetically hard