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Physics
Physics - Magnetism
| Question | Answer |
|---|---|
| What are the 2 poles of a magnet? | North and south |
| Where is the magnetic force strongest? | near the magnet's poles |
| What do like poles (N-N or S-S) do? | repel |
| What do unlike poles (N-S or S-N) do? | attract |
| What type of force is magnetic force? | non-contact (affect without touching) |
| Give 4 examples of magnetic materials? | iron, steel, nickel & cobalt |
| What is a 'permanent magnet'? | a magnet made from magnetic material, its magnetism cannot be turned off |
| What can a permanent magnet do? | produce its own magnetic field |
| What is an 'induced magnet'? | a temporary magnet made from a magnetic material placed in a magnetic field, it loses its magnetism when removed from the magnetic field |
| Induced magnets are only.... | attracted by other magnets, not repelled |
| What is a 'magnetic field'? | the region around a magnet where a force acts on another magnet or on a magnetic material |
| What is a 'magnetic field line'? | An imaginary line which indicates the direction of force caused by a magnet |
| Magnetic field lines never do what? | cross each other |
| Where is a magnetic field strongest? | Where the field lines are closest together |
| Where do the arrows on a magnetic field point? | from the north pole of the magnet to its south pole |
| What is the test for a permanent magnet? | the magnet repels another magnet |
| Why does the Earth have a magnetic field? | because its iron and nickel core is magnetic |
| What instrument can be used to map a magnetic field? | a plotting compass |
Created by:
samfitter
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