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What do magnets have?
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What do all magnets produce?
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P7 PHYSICS
PERMANENT AND INDUCED MAGNETS
| Question | Answer |
|---|---|
| What do magnets have? | All magnets have two poles-north (or north seeking) and south (or south seeking). |
| What do all magnets produce? | All magnets produce a magnetic field. |
| What is a magnetic field? | A region where other magnets or magnetic materials (e.g. iron, steel, nickel and cobalt) experience a force. |
| How can you show a magnetic field? | You can show a magnetic field by drawing magnetic field lines. The lines always go from north to south and they show which way a force would act on a north pole if it was put at that point in the field. |
| What does is mean when the lines are closer together when drawing magnetic field lines? | The closer together the lines are, the stronger the magnetic field. |
| What happens to the magnetic field when you get further away from the magnet? | The further away from a magnet you get, the weaker the field is. |
| Where is the magnetic field the strongest? | The magnetic field is strongest at the poles of a magnet. |
| Where are the magnetic forces the strongest? | This means that the magnetic forces are also strongest at the poles. |
| What is the force between a magnet and a magnetic material, no matter the pole? | The force between a magnet and a magnetic material is always attractive, no matter the pole. |
| What will happen if two poles of a magnet are put near each other? | If two poles of a magnet are put near each other, they will each exert a force on each other. |
| What can a force be? | This force can be attractive or repulsive. |
| If two poles are the same - what will happen? | Two poles that are the same (these are called like poles) will repel each other. |
| What will two unlike poles do? | Two unlike poles will attract each other. |
| What do compasses show? | Compasses show the directions of magnetic fields. |
| What is inside a compass? | Inside a compass is a tiny bar magnet. The north pole of this magnet is attracted to the south pole of any other magnet it is near. |
| What direction does the compass point in? | So the compass points in the direction of the magnetic field it is in. |
| If they are not near a magnet - what direction do compasses point? | When they're not near a magnet, compasses always point north. |
| Why do compasses always point north? | This is because the Earth generates its own magnetic field, which shows the inside (core) of the Earth must be magnetic. |
| What types of magnets are there? | There are two types of magnet-permanent magnets and induced magnets. |
| What are permanent magnets? | Permanent magnets produce their own magnetic field. |
| What are induced magnets? | Induced magnets are magnetic materials that turn into a magnet when they're put into a magnetic field. |
| What is the force between permanent and induced magnets? | The force between permanent and induced magnets is always attractive. |
| What happens to induced magnets when you take away the magnetic field? | When you take away the magnetic field, induced magnets quickly lose their magnetism (or most of it) and stop producing a magnetic field. |
Created by:
HJB1972
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