Physical Science Chapter 7 and 8 Vocabulary
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Created by:
Jaybreezy13 on January 11, 2012
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26 terms
Terms | Definitions |
|---|---|
 Static Electricity | electricity produced by friction |
| Law of Conservation of Charge | states that charge can be transferred from one object to another but cannot be created or destroyed |
| Conductor | a material that easily allows the flow of electricity |
| Insulator | a material that does not allow heat or electrons to move through it easily. |
| Charging by contact | process of transferring charge between objects by touching or rubbing |
| Charging by induction | Charging an object without direct contact between the object and a charge |
| Electric Current | a flow of electricity through a conductor |
| Circuit | an electrical device that provides a path for electrical current to flow |
| Voltage Difference | the push that causes charges to flow from an area of high voltage to an area of low voltage. measured in volts |
| Resistance | any mechanical force that tends to retard or oppose motion |
| Ohm's Law | the law that states that resistance is equal to voltage divided by current. |
| Series Circuit | a circuit in which the objects are connected in a single path |
| Parallel Circuit | a closed circuit in which the current divides into two or more paths before recombining to complete the circuit |
| Electric Power | the rate at which electrical energy is converted to another form of energy |
| Magnetism | the force of repulsion (pushing) or attraction (pulling) between poles of magnets |
| Magnetic Field | the region around a magnet where the magnetic force is exerted |
| Magnetic Pole | one of two points, such as the ends of a magnet, that have opposing magnetic qualities |
| Magnetic domain | a region in which the magnetic fields of all atoms are lined up in the same direction |
| Electromagnet | temporary magnet made by passing an electric current through a wire coiled around an iron bar |
| Electric Motor | a device that converts electrical energy into mechanical energy |
| Electromagnetic Induction | the process of creating a current in a circuit by changing a magnetic field |
| Generator | engine that converts mechanical energy into electrical energy by electromagnetic induction |
| Turbine | rotary engine in which the kinetic energy of a moving fluid is converted into mechanical energy by causing a bladed rotor to rotate |
| Direct Current | an electric current that flows in one direction steadily |
| Alternating Current | an electric current that reverses direction sinusoidally |
| Transformer | an electrical device by which alternating current of one voltage is changed to another voltage |
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