Electrical energy

electromagnetic field

A field of electromagnetic energy produced by electricity flowing through power lines.

ohm's law

the current in a circuit equals the voltage difference divided by the resistance

voltage

an electromotive force or potential difference expressed in volts.

current

A flow of electric charge, expressed in amps.

resistance

A material's opposition to the flow of electric current, expressed in ohms

work

Force exerted on an object that causes it to move

energy

ability to do work, expressed in joules

power

how much energy can be produced in a given amount of time, expressed in watts

Law of Conservation of energy

Energy cannot be created or destroyed

series circuit

A circuit in which all parts are connected end to end to provide a single path of current.

parallel circuit

A circuit that contains more than one path for current flow.

Current in a series circuit

current is the same everywhere

voltage in a series circuit

Voltage is shared between components

resistance in a series circuit

total resistance = sum of individual resistances

Current in a parrallel circuit

splits between each branch, then joins together to go back to the power source

voltage in a parallel circuit

voltage is the same across each component

Resistance in a parallel circuit

1/Rt = 1/R1 + 1/R2 + 1/R3

short circuit

A connection that allows current to take an unintended path.

voltmeter

meter that measures the potential difference between two points, connected in parallel

ammeter

a meter that measures the flow of electrical current in amperes, connected in series