27 terms

review card for test on electricity for 2014-2015 school year.

voltage

Chemical potential energy.

direct current

Current flowing in one direction.

direct current

the type of current supplied by a battery.

alternating current

Current that changes direction.

alternating current

the type of current supplied by wall outlets.

amperes

Unit of current.

amperes

symbolized by A.

resistance

electrical friction found in a circuit.

current

The flow of electricity through a circuit.

Ohm's Law

I=V/R

parallel

Circuit type where when one bulb goes out, the others remain on.

parallel

Circuit type found in your home.

series

Circuit type where, if one bulb goes out, the remaining bulbs in the circuit also go out.

ammeter

A device used to measure the current flow through a circuit.

voltmeter

A device that measures the potential energy difference across two points in a circuit. (measures voltage)

conductor

Any material that allows for the flow of electrons.

insulator

Any material that blocks the flow of electrons.

Power

The amount of energy a charge carries in a given amount of time.

Power

I*V (Current multiplied by Voltage)

kilowatt

1,000 watts

kilowatt-hour

Unit of energy used by the electric company to measure your electricity use. It's equal to 1,000 watts being used for one hour.

Ohm

Unit for resistance.

Ohm

symbolized by Ω.

watt

symbolized by W.

volt

unit for voltage.

total resistance in a series circuit

R1+R2+R3......

total resistance in a parallel circuit

(R1R2))/(R1+R2)