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Environ Scie ch21/22
Term | Definition |
---|---|
material that allows electrons to flow through it easily | conductor |
circuit with only one path | series circuit |
accumulation of electric charges on an object | static electricity |
device that detects electric charges | isotope |
tendency of a material to oppose electron flow | resistance |
material that does not allow electricity to flow through it | insulator |
circuit with more than one path | parallel circuit |
voltage | electric power |
area around electrons that exerts force | electric field |
pointed metal rod that directs lightning to earth | lightning rod |
flashlight battery | dry cell |
current is equal to a potential difference of a current divided by its distance | Ohm's law |
connected metal plates in a conducting solution | wet cell |
flow of electrons through a conductor | current |
closed path through which electrons flow | circuit |
unit of electric energy | kilowatt hour |
rate at which electric energy is changed to another energy form | potential difference |
the opposite ends of a magnet | magnetic pulse |
a device used to measure electric current | ammeter |
a device used to measure the potential difference of a circuit | voltmeter |
a device used to increase or decrease the voltage of a power line | transformer |
a material that does not have any resistance to the flow of electrons | super conductor |
current that flows in only one direction through a wire | direct current |
area around a magnetic where the magnetic forces act is | magnetic field |
when current in a circuit reveals its direction in a pattern | alternating current |
the property of matter in which there is a force of attraction or repulsion between unlike or like pulse | magnetism |
groups of aligned atoms in a magnet | magnetic domains |
when a current is passed through a current of wire | electromagnetic |
a device that changes electrical energy to mechanical energy | electric motor |
a device that produces an electric current by rotating loop of wire in a magnetic field | generator |
the process by which moving a wire through a magnetic field produces an electric current | electromagnetic induction |
superconducting trains would not lose ____ to the environment | energy |