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Chapter 7
Question | Answer |
---|---|
static electricity | the accumulation of excess electric charge on an object. |
law of conservation of charge | states that charge can be transferred from one object to another but cannot be created or destroyed. |
conductor | material, such as copper wire, in which electrons can move easily. |
insulator | material in which electrons are not able to move easily. |
charging by contact | process of transferring charge between objects by touching or rubbing. |
charging by induction | process of rearranging electrons on a neutral object by bringing a charged object close to it. |
electric current | the net movement of electric charges in a single direction, measured in amperes. |
voltage difference | related to the force that causes electric charges of flow; measured in volts. |
circuit | closed conducting loop through which an electric current can flow. |
resistance | tendency for a material to oppose electron flow ans change electrical energy into thermal energy and light; measured in ohms. |
ohm's law | states that the current in a circuit equals the voltage difference divided by the resistance. |
series ciruit | circuit in which electric current has only one path to follow |
parallel circuit | circuit in which electric current has more than one path of follow. |
electrical power | rate at which electrical energy is converted to another form of energy expressed in watts. |