Difference between revisions of "Power"
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| − | [[Power]] is the rate of [[Energy Transfer]] | + | [[Power]] is the rate of [[Energy Transfer]] or [[Work Done]]. |
===About Power=== | ===About Power=== | ||
Revision as of 16:22, 2 February 2019
Contents
Key Stage 3
Meaning
Power is the rate of Energy Transfer.
About Power
- The unit of power is the Watt.
- Power is how quickly energy is transferred from one store into another.
- Energy Transfered is the same as Work Done, so power is also the rate of work done.
Equation
\[Power = \frac{Energy Transferred}{Time}\] \[P = \frac{E}{t}\]
\[Power = \frac{Work Done}{Time}\] \[P = \frac{W}{t}\]
Where:
P = Power
E = Energy Transferred = W = Work Done
t = Time
Key Stage 4
Meaning
Power is the rate of Energy Transfer or Work Done.
About Power
Equations
\[Power = \frac{Work Done}{Time}\] \[P = \frac{W}{t}\]
Where:
P = Power
E = Energy Transferred = W = Work Done
t = Time
\[Power = Current |times PotentialDifference\] \[P = IV\]
Where:
P = Power
I = Current