(6) Magnetism and electromagnetism

Question 1

What are the strongest parts of a magnet?

Answer 1

It’s poles

Question 2

What is the difference between magnetically hard and soft materials?

Answer 2

Magnetically hard materials don’t loose their magnetism, whereas magnetically soft materials tend to easily loose their magnetism.

Question 3

What is a magnetic field?

Answer 3

A volume of space around a magnet where we can detect magnetism.

Question 4

What do magnetic field lines show?

Answer 4

1) The strength of a magnetic field.
2) The direction of the magnetic force.
3) The shape of the magnetic field.

Question 5

What is induced magnetism?

Answer 5

When we place a magnetic material inside a magnetic field it becomes a magnet, this is induced magnetism.

Question 6

What is electromagnetism?

Answer 6

When there is a current in a wire, there is a magnetic field around it. This is called electromagnetism.

Question 7

What does the right hand grip rule show?

Answer 7

The thumb points to the direction of the current and the other fingers point to the direction of the magnetic field.

Question 8

How can we increase the strength of the magnetic field?

Answer 8

• By increasing the current.

- By wrapping the wire into a solenoid.

Question 9

How can we increase the strength of a field around a solenoid?

Answer 9

• By increasing the current.
• By increasing the number of turns on the solenoid.
• Wrapping the solenoid around a soft iron core.