Electricity part 2

Current, Voltage, Resistance, and Power

Current

Electrical current is measured in amperes or "amps" for short. Amperes is like the amount of water flowing through a hose in a certain amount of time or the amount of electricity flowing through a wire. The scientific symbol for amps is the letter "I".




Batteries are a great example of sources of direct current.

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voltage

Is the potential difference in electrical charge between two different areas of the circuit.

Voltage is the force that pushes the current along through the circuit.



I know that, that isn't quite a real- life example but is a really goo one because you see the voltage is what keeps that electrons going in a circuit. That is what a circuit is so you put something like a light bowl to make it useful. Imagine of it like you put a firemen hose thought a bicycle wheel it'd go much faster then if you'd putted a garden hose right?!

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Resistance

In electricity, a measurement of the difficulty encountered by a power source in forcing electric current through an electrical circuit, and hence the amount of power dissipated in the circuit.



The resistance in science is kind of the same concept as it is in air resistance if there is more it slows down if there is less it fastens up.

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Power

is the amount of energy over time. This is still measured in Watts

Electrical Power Formula P=VI


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Connections

They are all part of a current and they are all very important in it.