Power Efficiency - Revision history

NRJC at 17:56, 6 April 2019

2019-04-06T17:56:33Z

NRJC at 20:22, 2 February 2019

2019-02-02T20:22:22Z

NRJC at 20:22, 2 February 2019

2019-02-02T20:22:03Z

NRJC: /* Key Stage 4 */

2019-02-02T20:21:37Z

‎Key Stage 4

NRJC: 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..."

2019-02-02T20:19:07Z

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..."

New page

==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>

@@ Line 17: / Line 17: @@
 Where:
-E<sub>Useful</sub> = The [[Useful Energy]] [[Energy Transfer|transferred]] to a device's intended purpose.
+P<sub>Useful</sub> = The useful power [[Energy Transfer|transferred]] to a device's intended purpose.
-E<sub>Total</sub> = The [[Total Energy]] [[Energy Transfer|transferred]] to a [[system]].
+P<sub>Total</sub> = The total power [[Energy Transfer|transferred]] to a [[system]].

← Older revision		Revision as of 20:21, 2 February 2019
Line 13:		Line 13:

	<math>Efficiency = \frac{P_{Useful}}{P_{Total}}</math>		<math>Efficiency = \frac{P_{Useful}}{P_{Total}}</math>
		+
		+
		+	Where:
		+
		+	E<sub>Useful</sub> = The [[Useful Energy]] [[Energy Transfer\|transferred]] to a device's intended purpose.
		+
		+	E<sub>Total</sub> = The [[Total Energy]] [[Energy Transfer\|transferred]] to a [[system]].

@@ Line 5: / Line 5: @@
 ===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''' 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 [[power]] out than you put in due to [[Conservation of Energy]].
+: '''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 [[power]] out than you put in due to [[Conservation of Energy]].
 ===Equation===