UNIT 9: MAGNETISM

Unit 9.1: Magnetism

Unit 9.2: The Earth as a giant magnet

Unit 9.3: Electromagnets

Unit 9.4: Investigating electromagnets

What is a mangnet

Magnetic fields

Definition of manetic field

Where is the magnetic field?

The level of mafnetic field

How to detect the magnetic field

Magnetic field lines

The role of the magnetic field

The rules of drawing magnetic field lines

Magnetic field interacting

The forces between two magnets

Draw the magnetic line between

2 magnets when their opposite poles are together

2 magnets when their like poles are together

The invention of the magnetic compass

What is the magnetic north and where is it now?

The role of the compass wtih human?

Draw the magnetic field line of Earth

The origin of the Earth's magnetic field

Properties of magnetic materials

Electromagnets

How is an electromagnet made

Poles of an electromagnet

How to fiind out which poles

How to reverse the poles ò an electromagnet?

Application of electromagnets

Fire door

MRI scanner

Sorting scrap metal

A toaster

Electric bell

3 ways to increase the strength of an electromagnet

What is soft iron?