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20 Cards in this Set

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  • Back
electric field
an area surrounding an electron that exerts a force on anything near by.
conductor
a material that allows electrons to move easily through it.
insulator
a material that doesnt allow electrons to move through it easily.
electroscope
made of two thin metal leaves attached to a metal rod with a knob at the top.
current
the flow of electrons through a wire or any conductor
circuit
a closed path through which electrons can flow.
dry cell
can act as a nelectron pump because it has potential difference between the positive and negative terminals.
electrical power
the rate at whcih electrical energy is converted to another form of energy.
ampere
SI unit of electrical current.
watt
SI unit for power.
Ohm
SI unit of electrical resistance.
Wet Cell
Contains two connected plates made of different metals or metallic compounds in an electrolyte solution.
Volt
SI unit for potential difference.
Static Electricity
The net accumulation of electric charges on an object.
Series Circuit
The current has only one path it can travel along.
Resistance
The tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy.
Potential Difference
The difference in potential between two different places, and is measured in volts.
Parallel Circuits
Contain separate branches of current to move through.
Ohms Law
States that potential difference equals current times resistance.
Kilowatt-Hour
Unit of electrical energy.