Magnets

Question 1

What do all magnets have

Answer 1

Two poles and a magnetic field

Question 2

Where do lines on a magnet drawing go

Answer 2

North to South
The closer that they are the stronger the magnet field
Poles are where the magnet is strongest

Question 3

Describe what happens when two magnets come into contact with each other

Answer 3

Two identical poles will repel each other and two opposite poles with attract each other

Question 4

How do compasses work

Answer 4

There is a tiny bar magnet inside the compass, so the compass points in the direction of the magnetic field that it is in (Earth has a magnet field around it from the two poles of the Earth)

Question 5

Permanent Magnets

Answer 5

Produce their own magnetic field

Question 6

Induced magnets

Answer 6

Magnetic materials that become magnetic in a magnetic field
The attraction is always attractive (not repelled)

Question 7

What happens when a current flows through a wire?

Answer 7

A magnetic field is created around the wire
Made up of Concentric circles perpendicular to the wire, with the wire at the centre

Question 8

What is the right hand rule

Answer 8

Point thumb in direction of the current and the direction of curled fingers is the direction of the magnetic field

Question 9

What is a solenoid?

Answer 9

A coil of wire that increases the strength of a magnetic field

Question 10

Uses of electromagnets

Answer 10

Can be turned off and on
Used in some cranes to attract and pick up magnetic material to be deposited in a different location
Used to act as switches in circuits