Created by Muhammad Imran
almost 7 years ago
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Question | Answer |
what materials do magnets attract? | iron, cobalt and nickel. |
how can a magnets strength be determined? | you can use a compass or sprinkling iron fillings around the magnet. |
what do magnetic fields do? | *show direction of compass *run from north to south *don't cross *strong when bundled together *weak when further apart |
what 2 poles repel each other? | south and south and north and north. |
which 2 poles attract? | south and north. |
what are the magnetic particles in a metal? | domains. |
in a piece of magnetized iron which way do domains point? | the same direction. |
in a piece of unmagnetized iron which way do domains point? | random directions. |
whats a temporary magnet? | when it acts like a magnet for a short period of time. |
how can permanent magnets be made? | hitting or heating the medal to keep domains in same area. |
whats an electromagnet? | much stronger magnetic field. |
does Earth have a magnetic field? | yes. |
where does an electrostatic force act? | within an electric field. |
what is an atom? | everything is made of small particles called atoms. |
what is an atom made of? | proton, neutrons and electrons. |
what is static electricity? | the build up of charge. |
what is an insulator? | when materials build up charge when rubbed with other substances. |
what is a conductor? | when metallic objects don't build up charge. |
when does static electricity occur? | when an object becomes charged. |
what can magnets be used for everyday? | drills, hairdryers, credit cards, speakers MRI scans etc. |
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