# Physics

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Static electricity
When two objects are rubbed together, electrons are transferred from one object to the other. One object becomes positive and the other negative. A non-contact force exists between charged objects.
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Moving charges
When you rub two different materials against each other, they become electrically charged. This only works for electrically insulated objects and not with materials like metals, which conduct. For example, if you rub an acetate plastic rod with a dus
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Forces from static electricity
A charged object creates an electric field. You cannot see an electric field, but it surrounds the charged object. If another charged object is moved into the electric field, a force acts on it. The force is a non-contact force because the charged ob
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Showing that an object is charged
Charged objects will also attract small, uncharged objects. This is why a charged plastic comb or ruler, or a party balloon, can pick up small pieces of paper. The only way to tell if an object is charged is to see if it repels another charged objec
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Magnetic fields
A magnet creates a magnetic field around it. You cannot see a magnetic field, but you can observe its effects. A force is exerted on a magnetic material brought into a magnetic field. The force is a non-contact force because the magnet and the materi
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The earth's magnetism
The Earth behaves as if it contains a giant magnet. It produces a magnetic field in which the field lines are most concentrated at the poles. This magnetic field can be detected using magnetic materials or magnets.
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Info magnetism
A magnetic field is strongest close to a magnet and rapidly becomes weaker the further you go from the magnet. You may have used iron filings in your science lessons to see the shape of a magnetic field round a bar magnet.
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## Other cards in this set

### Card 2

#### Front

When you rub two different materials against each other, they become electrically charged. This only works for electrically insulated objects and not with materials like metals, which conduct. For example, if you rub an acetate plastic rod with a dus

Moving charges

### Card 3

#### Front

A charged object creates an electric field. You cannot see an electric field, but it surrounds the charged object. If another charged object is moved into the electric field, a force acts on it. The force is a non-contact force because the charged ob

### Card 4

#### Front

Charged objects will also attract small, uncharged objects. This is why a charged plastic comb or ruler, or a party balloon, can pick up small pieces of paper. The only way to tell if an object is charged is to see if it repels another charged objec

### Card 5

#### Front

A magnet creates a magnetic field around it. You cannot see a magnetic field, but you can observe its effects. A force is exerted on a magnetic material brought into a magnetic field. The force is a non-contact force because the magnet and the materi