Term
| How do the following charges interact? positive+positive, positive+ negative, negative + negative. |
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Definition
| p+p repel, p+n attract, n+n repel |
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Term
| How can an object become charged? |
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Definition
| by rubbing an object electrons can be transferred resulting in the object becoming negatively charged |
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Term
| What 3 particles are in an atom? |
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Definition
| proton, neutron, electron |
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Term
| what is an electric field? |
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Definition
| an area around a charged object where a force will act on another charged object |
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Term
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Definition
| the flow of electrons/charges |
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Term
| what do we use to measure current? |
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Definition
| using an ammeter connected in series |
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Term
| What is potential difference/voltage? |
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Definition
| the push force that makes electrons move |
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Term
| How do you measure voltage? |
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Definition
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Term
| How do you calculate resistance? |
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Definition
| potential difference/ current and measured in Ohms |
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Term
| Define a conductor and an insulator |
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Definition
| conductors have low resistance and allow electrons to flow. insulators do not have electrons that can flow |
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Term
| What happens to current in a series circuit when you add in extra components? |
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Definition
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Term
| What is the current like in a series circuit at different points? |
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Definition
| it is the same at all points in the circuit |
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Term
| What happens to current in a parallel circuit? |
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Definition
| current splits down branches in a parallel circuit |
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Term
| What is potential difference like across different components in a series circuit vs a parallel circuit? |
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Definition
| in a series circuit, potential difference from the battery divides across components. In a parallel circuit, the potential difference is the same for each component as it is across the battery |
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Term
| Describe briefly how to map out the magnetic field of a magnet |
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Definition
| put a compass at one end of a bar magnet, put a dot using a pencil where the needle points, move the compass to the other side of the dot and repeat. Do this all around the magnet and join up the dots when you get to the end of the page |
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Term
| How can you make an electromagnet? |
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Definition
| wrap a coil of wire around an iron core and connect it to a power pack and allow current to flow. It will turn into a magnet |
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Term
| How can you make an electromagnet stronger? |
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Definition
| add more coils, more potential difference |
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Term
| Name some uses of electromagnets |
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Definition
| switching on dangerous equipment- relay, in a scrap yard to pick up and drop iron, in an electric bell |
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