Ch 21 Physics
Terms
undefined, object
copy deck
- 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.