Difference between revisions of "Useful Energy"
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===Meaning=== | ===Meaning=== | ||
'''Useful energy''' is the [[Energy Transfer|energy transferred]] to a device's intended purpose. | '''Useful energy''' is the [[Energy Transfer|energy transferred]] to a device's intended purpose. | ||
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| + | ===About Useful Energy=== | ||
| + | : When [[energy]] is [[Energy Transfer|transferred]], the [[Total Energy|total]] [[Energy Transfer|energy transferred]] will not all go into one [[Energy Store|store]]. Some will be transferred '''usefully''' and some will be [[Wasted Energy|wasted]]. | ||
| + | : '''Useful Energy''' = ([[Total Energy]] transferred) - ([[Wasted Energy]]) | ||
| + | : '''Useful energy''' can be used to calculate the [[Energy Efficiency|efficiency]] of an [[Energy Transfer|energy transfer]]. | ||
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| + | ===References=== | ||
| + | ====AQA==== | ||
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| + | :[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Useful energy, pages 14-19, 21, GCSE Physics; Third Edition, Oxford University Press, AQA ''] | ||
Latest revision as of 16:30, 14 November 2019
Key Stage 4
Meaning
Useful energy is the energy transferred to a device's intended purpose.
About Useful Energy
- When energy is transferred, the total energy transferred will not all go into one store. Some will be transferred usefully and some will be wasted.
- Useful Energy = (Total Energy transferred) - (Wasted Energy)
- Useful energy can be used to calculate the efficiency of an energy transfer.