20,345
edits
Changes
Created page with "==Key Stage 4== ===Meaning=== '''Power efficiency''' is a ratio of useful power transferred to total power put into a system. ===About Eff..."
==Key Stage 4==
===Meaning===
'''Power efficiency''' is a [[ratio]] of useful [[power]] [[Energy Transfer|transferred]] to total [[power]] put into a [[system]].
===About Efficiency===
: '''Power efficiency''' is a [[measure]] of how effectively [[energy]] is [[Energy Transfer|transferred]] from one [[Energy Store|energy store]] into an intended [[Energy Store|energy store]].
: '''Efficiency''' may be written as a [[percentage]] or as a [[decimal]].
: '''Efficiency''' as a [[percentage]] can never be greater than 100% and as a [[decimal]] can never be greater than 1 because you can never get more [[energy]] out than you put in due to [[Conservation of Energy]].
===Equation===
'' '''Efficiency''' = (Useful Power Out)/(Total Power In)''
<math>Efficiency = \frac{P_{Useful}}{P_{Total}}</math>
===Meaning===
'''Power efficiency''' is a [[ratio]] of useful [[power]] [[Energy Transfer|transferred]] to total [[power]] put into a [[system]].
===About Efficiency===
: '''Power efficiency''' is a [[measure]] of how effectively [[energy]] is [[Energy Transfer|transferred]] from one [[Energy Store|energy store]] into an intended [[Energy Store|energy store]].
: '''Efficiency''' may be written as a [[percentage]] or as a [[decimal]].
: '''Efficiency''' as a [[percentage]] can never be greater than 100% and as a [[decimal]] can never be greater than 1 because you can never get more [[energy]] out than you put in due to [[Conservation of Energy]].
===Equation===
'' '''Efficiency''' = (Useful Power Out)/(Total Power In)''
<math>Efficiency = \frac{P_{Useful}}{P_{Total}}</math>