Chapter 6: Basic Magnetism

Question 1

What are the two sides of the magnet called?

Answer 1

The North and South poles

Question 2

In what direction odes the magnetic field flow?

Answer 2

from north to south

Question 3

What are some examples of ferro-magnetic materials?

Answer 3

Iron, cobalt and nickel

Question 4

How do magnets interact with each other?

Answer 4

Magnets attract and repel other magnets and attract magnetic substances.

Question 5

What does it mean by a magnetically hard material?

Answer 5

Hard magnetic materials are hard to magnetise, but retain their magnetism better. They are used to make permanent magnets, and an example includes steel.

Question 6

What does it mean by a magnetically soft material?

Answer 6

Soft magnetic materials are easy to magnetise and lose their magnetism easily. They are used in electromagnets and an example includes iron.

Question 7

What is a magnetic field?

Answer 7

A magnetic field is the area in which a magnetic force is applied. It is a non-contact force.

Question 8

How are magnetic fields shown?

Answer 8

Magnetic field lines are drawn to represent the force. A high concentration of field lines shows that the field is strong and they do not cross over. Field lines always point away from the North pole and towards the South pole, and are closed loops.

Question 9

What is induced magnetism?

Answer 9

Magnetism can be induced when ferro-magnetic materials are in the presence of magnets.