Unit J Unit J Magnets and ElectromagnetsMagnets and Electromagnets

Form 2C

8th of November

St. Mary´s College in Crosby

Todays Lesson...Todays Lesson...

Unit JMagnets and Electromagnets

J1 – Magnetic Fields

J2 - Magnets

J3 – Making Magnets

J4 - Electromagnets

J5 - Variables

J1 – Magnetic FieldsJ1 – Magnetic FieldsClass NotesClass Notes::

- There is a pulling force between There is a pulling force between magnets and some metals.magnets and some metals.

- The magnet The magnet attractsattracts the metal. the metal.

J1 – Magnetic FieldsJ1 – Magnetic Fields

Exercise...Exercise...

Which of those materials are metals?Which of those materials are metals?

X X

J1 – Magnetic FieldsJ1 – Magnetic Fields

Board Exercise ...Board Exercise ...

a)a) What would happen to the fridge magnets, if What would happen to the fridge magnets, if the fridge door in th ephoto was made of the fridge door in th ephoto was made of plastic?plastic?

b)b) Aluminium drinks cans be recycled, but not Aluminium drinks cans be recycled, but not steel ones. How can you decide if your drink steel ones. How can you decide if your drink can is steel or aluminium?can is steel or aluminium?

Magnetic Magic...Magnetic Magic...

Why do magnets sometimes attract and Why do magnets sometimes attract and sometimes repel?sometimes repel?

North pole

South pole

South Pole

North pole

Magnetic Magic...Magnetic Magic...Class Notes...Class Notes...

North pole

South pole

South Pole

North pole

-If we bring the north pole of two magnets If we bring the north pole of two magnets towards the south pole of another magnet they towards the south pole of another magnet they atract each other. atract each other.

-If you bring the north poles of two magnets If you bring the north poles of two magnets togheter they repel each other. Two south poles togheter they repel each other. Two south poles togheter also repel.togheter also repel.

Magnetic FieldMagnetic Field

Class Notes...Class Notes...

-- Magnetic field is the space all around a magnet Magnetic field is the space all around a magnet

where its magnetic force works. where its magnetic force works.

-- The magnetic field is very strong near the magnet. The magnetic field is very strong near the magnet.

What is a magnetic What is a magnetic Field?Field?

Magnetic Field Lines

Magnetic Circus Experiments...Magnetic Circus Experiments...

1 – “Magnetic 1 – “Magnetic Paper”Paper”

2 – Magnets2 – Magnets

3 – Attraction “vs” 3 – Attraction “vs” RepelRepel

Magnetic Circus Experiments...Magnetic Circus Experiments...

Interesting

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