2274458
Description
Flashcards by leonie_lebailly, updated more than 1 year ago
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Created by leonie_lebailly
almost 10 years ago
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| Question | Answer |
| Static Electricity | Charges which are not free to move build up in one place and often end up sparking or giving an electric shock to the next thing they touch |
| What causes static electricty? | 1. two insulating materials are rubbed together, and electrons get rubbed from one piece to the other 2. this leaves a positive static charge on one, and a negative on the other (the one the electrons moved from) |
| Give an example of static electricity | POLYTHENE/ACETATE The electrons move from the duster to the acetate rod which becomes negatively charged. With the Polythene rod, electrons move to the cloth making the cloth negatively charged and leaving the rod with an equal positive charge |
| Electric/ Static Shocks | CLOTHES: synthetic clothes are rubbed over each other and electrons get scraped off leaving static charges on both items. The items are attracted to each otherand sparks are created as the electrons rearrange themselves CAR SHOCKS: The same thing can happen between clothes and car seats and when you get out the car and touch the metal, you get a shock as the charge flows through it DOOR HANDLES: as you walk on a nylon carpet wearing shoes with insulated soles, the electrons transfer from the floor to you and builds up in your body. It is then released when you touch a door handle and gives you a shock |
| Electric Attraction | The charges on the surface of some materials can move a little. If a negatively charged item, like a balloon after being rubbed on your head, moves near to an object with a neutral charge, the electrons repel each other and the protons in the wall attract the balloon, making it stick. |
| Explain how lightning is caused | Inside a rain cloud, rain droplets and ice bump together, knocking off electrons. This leave the top on the cloud positively charged and the bottom negatively charged. This makes a huge voltage and big sparks. |
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