Power

Power

Power is the rate at which energy is transferred or at which work is done.
Power is measured in Watts, W.
One Watt is the power that would transfer one Joule of energy in one second.
The power of a process can be calculated as energy transferred ÷ time or work done ÷ time.
This can be written as \(P=\dfrac{E}{t}\) or \(P=\dfrac{W}{t}\) where:
- \(P\) is the power in W
- \(E\) is the energy transferred in J
- \(t\) is the time taken in s
If two processes transfer the same amount of energy, then the one that completes the process in less time has a greater power.

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