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Chap 17
Chapter 17- Introduction to Electricity
Question | Answer |
---|---|
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 |