Power - Revision history

Ellen References at 16:06, 18 December 2019

2019-12-18T16:06:03Z

Ellen References at 13:09, 27 November 2019

2019-11-27T13:09:12Z

Ellen References at 22:12, 10 November 2019

2019-11-10T22:12:42Z

NRJC at 13:28, 7 June 2019

2019-06-07T13:28:21Z

NRJC: /* Power, Work Done and Time */

2019-06-07T13:28:13Z

‎Power, Work Done and Time

NRJC at 13:28, 7 June 2019

2019-06-07T13:28:02Z

NRJC at 15:01, 6 April 2019

2019-04-06T15:01:49Z

NRJC: /* About Power */

2019-03-25T16:28:37Z

‎About Power

NRJC: /* Key Stage 4 */

2019-02-02T17:08:48Z

‎Key Stage 4

NRJC: /* Equations */

2019-02-02T16:58:46Z

‎Equations

← Older revision		Revision as of 16:06, 18 December 2019
Line 215:		Line 215:
	:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Power; work done, page 180, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']		:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Power; work done, page 180, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
	:[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Power; work done, page 66, GCSE Physics; The Revision Guide, CGP, Edexcel '']		:[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Power; work done, page 66, GCSE Physics; The Revision Guide, CGP, Edexcel '']
		+
		+	====OCR====
		+	:[https://www.amazon.co.uk/gp/product/1782945695/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945695&linkCode=as2&tag=nrjc-21&linkId=ceafcc80bcad6b6754ee97a0c7ceea53 ''Power, pages 169, 182, 207, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/1782945687/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945687&linkCode=as2&tag=nrjc-21&linkId=9a598e52189317a20311d7a632747bc9 ''Power, pages 35, 50, 87, Gateway GCSE Physics; The Revision Guide, CGP, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Power; And efficiency, pages 202-211, Gateway GCSE Physics, Oxford, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Power; Calculations, pages 75, Gateway GCSE Physics, Oxford, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Power; Electrical appliances, pages 202, Gateway GCSE Physics, Oxford, OCR '']
		+	:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Power; Electrical power, pages 114-115, Gateway GCSE Physics, Oxford, OCR '']

← Older revision		Revision as of 13:09, 27 November 2019
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	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Powers of ten, page 316, GCSE Combined Science Trilogy 1, Hodder, AQA '']		:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Powers of ten, page 316, GCSE Combined Science Trilogy 1, Hodder, AQA '']
	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Powers of ten, page 64, GCSE Physics, Hodder, AQA '']		:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Powers of ten, page 64, GCSE Physics, Hodder, AQA '']
		+
		+	====Edexcel====
		+
		+	:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Power, pages 203, 204, GCSE Physics, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Power, pages 80, 131, 154-155, 178, GCSE Physics, Pearson Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Power; electrical, page 155, GCSE Physics, Pearson Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Power; electrical, page 191, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Power; electrical, page 78, GCSE Physics; The Revision Guide, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Power; electrical, pages 244, 245, GCSE Physics, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Power; lenses, page 41, GCSE Physics; The Revision Guide, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Power; of a lens, page 121, GCSE Physics, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Power; ratings, page 244, GCSE Physics, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Power; work done, page 180, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
		+	:[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Power; work done, page 66, GCSE Physics; The Revision Guide, CGP, Edexcel '']

← Older revision		Revision as of 22:12, 10 November 2019
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	<math>P \approx 2100W</math>		<math>P \approx 2100W</math>
	\|}		\|}
		+
		+
		+	===References===
		+	====AQA====
		+
		+	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Power, pages 10-11, GCSE Physics, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Power, pages 13, 20-1, GCSE Physics; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac372 ''Power, pages 14, 17, GCSE Physics; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe10187 ''Power, pages 172, 174, GCSE Combined Science; The Revision Guide, CGP, AQA '']
		+	:[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 ''Power, pages 20-21, 68-69, 72-73, 229, GCSE Physics; Third Edition, Oxford University Press, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Power, pages 266-7, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Power, pages 32, 33, GCSE Combined Science Trilogy; Physics, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Power, pages 33, 34, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe10188 ''Power; electrical, pages 189, 190, GCSE Combined Science; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac373 ''Power; electrical, pages 32, 33, GCSE Physics; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Power; electrical, pages 47, 70-3, 75, 77, GCSE Physics; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Power; electrical, pages 88-91, GCSE Combined Science Trilogy; Physics, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Power; electrical, pages 91-94, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Power; in transformers, page 237, GCSE Physics, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Power; loss during electricity transmission, pages 238-9, GCSE Physics, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Power; of electrical appliances, pages 307-8, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Power; of electrical devices, pages 53-4, GCSE Physics, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Power; of transformers, pages 311, 312, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe10189 ''Power; ratings, page 189, GCSE Combined Science; The Revision Guide, CGP, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Powers of ten (maths), GCSE Chemistry; Student Book, Collins, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Powers of ten, page 316, GCSE Combined Science Trilogy 1, Hodder, AQA '']
		+	:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Powers of ten, page 64, GCSE Physics, Hodder, AQA '']

@@ Line 52: / Line 52: @@
 '' '''Power''' = ([[Electrical Current|Current]]) x ([[Potential Difference]])
-:<math>P = IV</math>
+<math>P = IV</math>
 Where:

@@ Line 38: / Line 38: @@
 '' '''Power''' = ''<math>\frac{Work Done}{Time}</math>
-:<math>P = \frac{W}{t}</math>
+<math>P = \frac{W}{t}</math>
 Where:

@@ Line 9: / Line 9: @@
 ===Equation===
-:<math>Power = \frac{Energy Transferred}{Time}</math>
+<math>Power = \frac{Energy Transferred}{Time}</math>
-:<math>Power = \frac{Work Done}{Time}</math>
+<math>P = \frac{E}{t}</math>
-:<math>P = \frac{W}{t}</math>
 Where:

@@ Line 123: / Line 123: @@
 | style="height:20px; width:200px; text-align:center;" |An electrical fan is plugged into a [[Electrical Socket|socket]] supplying 230V. An [[ammeter]] reading shows that the [[Electrical Current|current]] going into the fan is 0.20amps. Calculate the power of the fan correct to two [[Significant Figures|significant figures]].
 | style="height:20px; width:200px; text-align:center;" |A light bulb is supplied a current of 625mA. The [[Potential Difference|potential difference]] across the terminals on the [[Electrical Bulb|light bulb]] is 96 [[volt]]s. Calculate the [[power]] of the [[Electrical Bulb|bulb]] correct to two [[Significant Figures|significant figures]].
-| style="height:20px; width:200px; text-align:center;" |A [[Electrical Kettle|kettle]] is plugged into the [[Mains Electricity|mains supply]] which operates at 230V. It receives a current of 9.2Amps  Calculate the power of the kettle correct to two [[Significant Figures|significant figures]].
+| style="height:20px; width:200px; text-align:center;" |A kettle is plugged into the [[Mains Electricity|mains supply]] which operates at 230V. It receives a current of 9.2Amps  Calculate the power of the kettle correct to two [[Significant Figures|significant figures]].
 |-
 | style="height:20px; width:200px; text-align:left;" |'''1. State the known quantities'''

@@ Line 29: / Line 29: @@
 ===About Power===
 : The [[SI Unit]] of [[power]] is the [[watt]].
 ===Equations===

← Older revision		Revision as of 17:08, 2 February 2019
Line 119:		Line 119:

	===Calculating Electrical Power===		===Calculating Electrical Power===
		+	{\| class="wikitable"
		+	\| style="height:20px; width:200px; text-align:center;" \|An electrical fan is plugged into a [[Electrical Socket\|socket]] supplying 230V. An [[ammeter]] reading shows that the [[Electrical Current\|current]] going into the fan is 0.20amps. Calculate the power of the fan correct to two [[Significant Figures\|significant figures]].
		+	\| style="height:20px; width:200px; text-align:center;" \|A light bulb is supplied a current of 625mA. The [[Potential Difference\|potential difference]] across the terminals on the [[Electrical Bulb\|light bulb]] is 96 [[volt]]s. Calculate the [[power]] of the [[Electrical Bulb\|bulb]] correct to two [[Significant Figures\|significant figures]].
		+	\| style="height:20px; width:200px; text-align:center;" \|A [[Electrical Kettle\|kettle]] is plugged into the [[Mains Electricity\|mains supply]] which operates at 230V. It receives a current of 9.2Amps Calculate the power of the kettle correct to two [[Significant Figures\|significant figures]].
		+	\|-
		+	\| style="height:20px; width:200px; text-align:left;" \|'''1. State the known quantities'''
		+
		+	I = 0.20A
		+
		+	V = 230V
		+	\| style="height:20px; width:200px; text-align:left;" \|'''1. State the known quantities'''
		+
		+	I = 625mA = 0.625A
		+
		+	V = 96V
		+	\| style="height:20px; width:200px; text-align:left;" \|'''1. State the known quantities'''
		+
		+	I = 9.2A
		+
		+	V = 230V
		+	\|-
		+	\| style="height:20px; width:200px; text-align:left;" \|'''2. [[Substitute (Maths)\|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)\|solve]].'''
		+
		+	<math>P = IV</math>
		+
		+	<math>P = I \times V</math>
		+
		+	<math>P = 0.20 \times 230</math>
		+
		+	<math>P = 46W</math>
		+	\| style="height:20px; width:200px; text-align:left;" \|'''2. [[Substitute (Maths)\|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)\|solve]].'''
		+
		+	<math>P = IV</math>
		+
		+	<math>P = I \times V</math>
		+
		+	<math>P = 0.625 \times 96</math>
		+
		+	<math>P = 60W</math>
		+	\| style="height:20px; width:200px; text-align:left;" \|'''2. [[Substitute (Maths)\|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)\|solve]].'''
		+
		+	<math>P = IV</math>
		+
		+	<math>P = I \times V</math>
		+
		+	<math>P = 9.2 \times 230</math>
		+
		+	<math>P = 2116W</math>
		+
		+	<math>P \approx 2100W</math>
		+	\|}

@@ Line 31: / Line 31: @@
 ===Equations===
+====Power, Work Done and Time====
 '' '''Power''' = ''<math>\frac{Work Done}{Time}</math>
@@ Line 43: / Line 43: @@
 t = Time
 '' '''Power''' = ([[Electrical Current|Current]]) x ([[Potential Difference]])