science vocab 22
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- voltmeter
- a device used to measure electrostatic potential differences between two points.
- electric motor
- transfers electric energy to mechanical energy
- alternating current
- an electric current that reverses its direction at regularly recurring patterns
- direct current
- an electric current that flows in one direction
- magnetic field
- the region around a magnet where the magnetic force is exerted
- ammeter
- a meter that measures the flow of electrical current in amperes
- electromagnet
- a temporary magnet made by coiling wire around an iron core
- generator
- a device that uses electromagnetic induction to convert mechanical energy to electrical energy
- magnetic pole
- the ends of a magnet, where magnetic force are greatest
- transformer
- a device that can alternating current of voltage
- magnetism
- a property of some metals there isa force of repulsion or attraction between certain lke and unlike poles
- magnetic domain
- group of atoms that are alligned by magnetic pole
- superconductor
- a material that has no electrical resistance
- electromagnetic induction
- process in which electic current is produced by moving a wire loop