Datasheet-1

There is an area around a magnet where it can affect other objects, called a magnetic field. It is

strongest at the ends of the magnet.

2. Slowly move your compass around the magnet and watch its pointer to see the magnetic field.

3. Shake the iron filings pack to spread the filings evenly. Move the magnet over the filings and

you can see the magnetic field in them.

4. Loop two paper clips together. Hold them near the magnet and move them around it to see the

magnetic field.

Project 46

Magnetic Fields

A magnet has a magnetic field, and a bat-

tery has an electric field. The north and

south poles of a magnet are comparable

to the positive and negative terminals of

a battery.

Electric and magnetic fields affect each

other. If you place a magnet next to a

radio your reception can be disturbed.

Magnet - magnetic field

Battery - electric field

Permanent magnets are made

by exposing iron (or other met-

als) to a much stronger mag-

netic field, usually from an

electromagnet.

Magnets can

magnetize other materials

(usually iron), concentrating

their magnetic charges at op-

posite ends. This causes the

magnetic attraction/ repulsion

that you see. Magnetization

can be temporary or long-last-

ing, depending on the materi-

als and magnetic force used.

For example, Paper Clips at-

tracted to a magnet some-

times stick together after the

magnet is removed. Most

magnets can be demagnet-

ized using heat or vibration.

Name some items that use magnets:

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