2051631
Description
Flashcards by James Middleton4075, updated more than 1 year ago
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Created by James Middleton4075
almost 10 years ago
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| Question | Answer |
| When one insulating material is rubbed with another electrically charged material it can become electrically charged. Why is this? | This due to the transfer of electrons. Electrons carry negative charge. The electrons transfer from one material to the other, leaving one material with a positive charge and the other with a negative charge. The atoms or molecules that become charged are then called ions. |
| How can you discharge electricity and how does this process work? | By earthing it. When an object discharges, electrons are transferred from the charged object to the earth. If you become electrically charged, earthing can result in you gaining an electric shock. |
| What is one problem with static electricity? | Some places such as flour mills and petrochemical factories, have atmospheres that contain extremely flammable gas or high concentrations of fine particles. A discharge/spark can leas to an explosion which can be very dangerous. |
| Two insulating materials with the same charge will repel each other. What will two materials with different charges do? | They will attract each other |
| Give 3 ways you can reduce the chance of receiving an electric shock | Ensuring that appliances are correctly earthed Using insulation mats effectively Wearing shoes with insulating soles |
| Lorries that contain flammable gases, liquids or powders need to be earthed before unloading as friction can cause a build up of charge and lead to a spark which could then ignite the flammable substance. What ways are there of reducing the problems of static electricity? | Anti static sprays, liquids and cloths help to reduce the problems of static electricity by preventing the transfer of charge from one insulator to another. |
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