Chapter 17- Introduction to Electricity
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| law of electric charges | the law that states that like charges repel and opposite charges attract | ||||
| electric force | the force of attraction or repulsion on a charged particle that is due to an electric field | ||||
| electric field | the space around a charged object in which another charged object experiences an electric force | ||||
| electrical conductor | a material in which charges can move freely | ||||
| electrical insulator | a material in which charges CANNOT move freely | ||||
| static electricity | electric charge at rest; generallyproduced by friction or induction | ||||
| electric discharge | the release of electricity stored in a source | ||||
| electric current | the rate at which charges pass through a given point;measured in amperes | ||||
| voltage | the potential difference between two points; measured in volts | ||||
| resistance | in physical science, the opposition presented to the current by a material or device | ||||
| cell | in electricity, a device that producese an electric current by converting chemical or radiant energy into electrical energy | ||||
| thermocouple | a device that converts thermal energy into electrical energy | ||||
| photocell | a device that converts light energy into electrical energy | ||||
| electric power | the rate at which electrical energy is converted into other forms of energy | ||||
| series circuit | a circuit in which the parts are joined one after another such that the current in each part is the same. | ||||
| parallel circuit | a circuit in which the parts are joined in branches such that the potential difference across each part is the same |
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Created by:
bobdog
on 2010-04-14