8J MAGNETS AND ELECTROMAGNETS

Magnets What is magnetism?

Where do we use magnets?

What materials are magnetic?

Where do we use magnets?

Find something magnetic in the class.

Aim: To investigate which metals are magnetic 1. Brass 2. Copper 3. Aluminium 4. Iron 5. Zinc 6. Tin 7. Lead 8. Scissors (Steel)

Magnetic Materials

Glass Copper Stone WoodPlastic

AluminiumSteel / Iron Ceramics Gold Nickel

Cobalt

Magnetic poles What are the two ends of a magnet

called?

What happens when you put two of the same poles near each other?

What happens when you put two different poles near each other?

Attraction & Repulsion

Magnetic fields What does a magnetic field show?

Sketch the magnetic field round a bar magnet.

Magnetism

S N

Magnetism

S N

Which direction is

the magnetic

field?

Where is the magnetic

field strongest?

Now, draw the magnetic field round a bar magnet using a plotting compass

The Earth’s Magnetic Field

Making magnets What is a magnet?

What is a magnetic material?

Are magnetic materials always magnets?

How can you make a magnet?

Turn the nail into a magnet…

Design a compassDesign a compass

The equipment you can use is: a paper clip foam Dish with water A compass (to check yours is right)

If you need any more equipment ask Ms. Stamp.

Ferrofluid - DEMO http://youtu.be/XUz1ZI-w6LQ

AF2- individual worksheet

ELECTROMAGNETS What is an electromagnet?

Why are electromagnets useful?

Where are electromagnets used?

Making an electromagnet Make an electromagnet, see how

many paper clips it can pick up

Draw a diagram of the electromagnetWrite about how you made it.

Maglev Train http://youtu.be/VuSrLvCVoVk

http://youtu.be/2--43eAS1iY

Extrahttp://youtu.be/weWmTldrOyo

Lab report assessment

Investigate how one factor affects electromagnet strength