Magnets

Question 1

What happens to 2 like poles

Answer 1

Repulsion
(Non contact)

Question 2

Describe a permanent magnet

Answer 2

Produces its own magnetic field
Eg bar magnet

Question 3

Describe an induced magnet

Answer 3

Object that becomes a magnet when placed in a magnetic field

Question 4

Describe induced magnetism

Answer 4

Always causes a force of attraction

Question 5

List the types of magnetic material

Answer 5

Iron, steel, cobalt, nickel

Question 6

Describe a magnetic field

Answer 6

Region around a magnet where a force acts on another magnet or on a magnetic material

Question 7

What does the strength of magnetic field depend on

Answer 7

Distance from the magnet

Question 8

How to find direction of magnetic field

Answer 8

Use a compass
- contains a small bar magnet

Question 9

What happens when a current flows through a conducting wire

Answer 9

Magnetic field produced around the wire

Question 10

What happens if we change direction of current

Answer 10

Change direction of magnetic field

Question 11

How to increase strength of magnetic field

Answer 11

Coil the wire
= solenoid shape
- when current is on we get strong and uniformed magnetic field inside solenoid

Question 12

3 ways to increase strength of magnetic field through a solenoid

Answer 12

• increase size of current
• increase number of turns of coil
• place a piece of iron inside the solenoid