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unit 3
| Term | Definition |
|---|---|
| electric charge | a fundamental property that leads to the electromagnetic interactions among particles that make up matter |
| static electricity | electric charge at rest generally produced by friction or induction |
| electrical conductor | a material in which charges can move freely |
| electrical insulator | a material in which charges cannot move freely |
| semiconductor | an element or compound that conducts electrical current better than an insulator but not as well as a conductor does |
| electrical current | the rate at which electrical charges pass a given point |
| voltage | the amount of work to move a unit electric charge between two points expressed in volts |
| resistance | in physical science the opposition presented to the current by a material or device |
| electric circuit | a set of electrical components connected such that they provide one or more complete paths for the movement of charges |
| series circuit | a circuit in which the paths are joined one after another such that the current in each path is the same |
| parallel circuit | a circuit in which the parts are joined in branches such that the voltage across each part is the same |
| magnet | any material that attracts iron or materials containing iron |
| magnetic force | the force or attraction or repulsion generated by moving or spinning electric charges |
| magnetic pole | one of two points such as the ends of a magnet that have opposing magnetic qualities |
| magnetic field | a region where a magnetic force can be detected |
| electromagnetism | the interaction between electricity and magnetism |
| solenoid | a coil of wire with an electric current in it |
| electromagnet | a coil that has a soft iron core and that acts as a magnet when an electric current is in the coil |
| 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 |
| transformer | a device that increases or decreases the voltage of alternating current |
| electric generator | a device that coverts mechanical energy into electrical energy |
| electronic device | a device that produces or is powered by a flow of electrons and contains an integrated circuit |
| integrated circuit | a circuit whose components are formed on a single semiconductor |
| analog signal | a signal whose properties can change continuously in a given range |
| digital signal | a signal that can be represented as a sequence of discrete values |
| computer | an electronic device that can accept data and instructions follow the instructions and output the results |
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18delucian0902
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