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Unit 3, Lessons 1-4
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 electric current better than an insulator does but not as good as a conductor does. |
Electric current | the rate at which electric charges past a given point. |
Voltage | the amount of work to move a unit electric charge between two points:expressed in volts. |
Resistance | 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 the charges. |
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 voltage across each part is the same. |
Magnet | any material that attracts iron or materials containing iron. |
Magnetic Force | the force of 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. |
Electromagnet | a coil that has a soft iron core and that acts as a magnet when an electric current is in the coil. |