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potential difference

electric current

an increase in voltage causes a greater flow of


the greater this is, the less current there is for a given voltage.

parallel circuit

type of circuit where different parts of the circuit are on separate branches

circuit breaker

safety device that uses an electromagnet to shut off a circuit when the current becomes too great.


circuit is designed to carry electric currents from a short directly to Earth.

lightning rod

created by Ben Franklin to carry charge through a wire to the Earth during a storm.


causes the current to flow

battery & generator

2 examples of voltage sources

path of least resistance

an electric current will always travel on ________

series circuit

type of circuit where all of the bulbs will become dimmer as more bulbs are added

short circuit

a connection that allows the current to take an unintended path.

rubber-soled shoes

decrease the chance of serious injury if you become part of a circuit.


disadvantage is that they can only be used once.

stay low and dry

best way to protect yourself if outside during a lightning storm.

1 amp

effect on the body is to stop the heart and cause burns.

how houses are wired

parallel circuit


rate at which energy is transformed from one form to another


voltage X current


unit of power


power X time


unit of energy

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