P7 Homework - Retrieval Practice

Question 1

Is Magnetism an example of a contact or non-contact force?

Explain your answer

Answer 1

Magnetism is a non-contact force

This is because it does not have to touch to have an effect

Question 2

What will 2 like poles of a magnet do?

Answer 2

Repel

Question 3

What will 2 different poles of a magnet do?

Answer 3

Attract

Question 4

Give examples of metals which are magnetic

Answer 4

Iron
Steel
Nickel
Cobalt

Question 5

What do the magnetic field lines look like around a bar magnet?

(make sure you can draw this)

Answer 5

Travel from the north pole to south pole

They come out of the north pole and wrap around to the south pole

Question 6

Where is the magnetic field strongest on a magnet?

Answer 6

At the poles

Question 7

What is a solenoid?

Answer 7

A wire wrapped into a coil

Question 8

What is an electromagnet?

Answer 8

A solenoid (coil of wire) with an iron core

Question 9

What does the magnetic field around a wire look like?

(make sure you can draw this)

Answer 9

The magnetic field moves in circles around the wire

These get further apart the further you get from the wire

Current up - field anticlockwise

Question 10

How can you increase the field strength of a wire?

Answer 10

Increase the current

Wrap it into a coil (solenoid)

Question 11

What does the magnetic field around a solenoid look like?

(make sure you can draw this)

Answer 11

Similar to a bar magnet

Lines travel from the north pole to south pole

They come out of the north pole and wrap around to the south pole

Question 12

How can you increase the strength of an electromagnet?

Answer 12

Increase the current

Increase the number of coils