Difference between revisions of "Parallel Circuit"
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:[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 ''Parallel circuits, pages 72-76, 78, 79, GCSE Combined Science Trilogy; Physics, CGP, 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 ''Parallel circuits, pages 72-76, 78, 79, 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 ''Parallel circuits, pages 74-78, 80, 81, GCSE Physics; The Complete 9-1 Course for AQA, 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 ''Parallel circuits, pages 74-78, 80, 81, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA ''] | ||
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| + | ====Edexcel==== | ||
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| + | :[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 ''Parallel circuits, page 141, GCSE Physics, Pearson 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 ''Parallel circuits, page 75, GCSE Physics; 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 ''Parallel circuits, pages 188, 189, GCSE Combined Science; 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 ''Parallel circuits, pages 235-238, 240, 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 ''Parallel circuits; resistors, page 147, GCSE Physics, Pearson Edexcel ''] | ||
Revision as of 11:43, 24 November 2019
Contents
Key Stage 3
Meaning
A Parallel Circuit is an electrical circuit with two or more paths the current can flow along.
About Parallel Circuits
- In a parallel circuit the current is split at junctions before taking a different path.
- Switches can be placed in a Parallel Circuit to allow current along one path at a time.
- Components placed in parallel with each other have the same Potential Difference across them.
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| The current from the battery splits at the junction sharing the current between the two bulbs. | The two bulbs in this parallel circuit can be switched on and off separately. |
Examples
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| The cell, bulb and voltmeter are in parallel so they have the same potential difference across them. | The two bulbs are in parallel so they have the same potential difference across them but may have a different current passing through them. | The bulb and motor are in parallel so they have the same potential difference across them but may have a different current passing through them. |
Key Stage 4
Meaning
A Parallel Circuit is an electrical circuit with two or more paths the current can flow along.
About Parallel Circuits
- In a parallel circuit the current is split at junctions before taking a different path.
- Switches can be placed in a parallel circuit to allow current along one path at a time.
- Components placed in parallel with each other have the same potential difference across them.
|
|
| The current from the battery splits at the junction sharing the current between the two bulbs. | The two bulbs in this parallel circuit can be switched on and off separately. |
Examples
|
|
|
| The cell, bulb and voltmeter are in parallel so they have the same potential difference across them. | The two bulbs are in parallel so they have the same potential difference across them but may have a different current passing through them. | The bulb and motor are in parallel so they have the same potential difference across them but may have a different current passing through them. |
Resistors in Parallel
NB: You only need to know what happens with identical resistors in parallel.
- When identical resistors are added in parallel there are more paths for the electricity so the resistance is reduced.
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| Two identical resistors in parallel gives twice the number of paths, so has half the resistance.
The resistance between points A and B is 12Ω. |
Three identical resistors in parallel gives three times the number of paths, so has a third of the resistance.
The resistance between points A and B is 8Ω. |
Four identical resistors in parallel gives four times the number of paths, so has a quarter of the resistance.
The resistance between points A and B is 6Ω. |
References
AQA
- Parallel circuit, pages 54-5, 62-3, GCSE Physics; Student Book, Collins, AQA
- Parallel circuits, page 29, GCSE Physics; The Revision Guide, CGP, AQA
- Parallel circuits, page 302, GCSE Combined Science Trilogy 1, Hodder, AQA
- Parallel circuits, pages 186, 187, GCSE Combined Science; The Revision Guide, CGP, AQA
- Parallel circuits, pages 29, 30, GCSE Physics; The Revision Guide, CGP, AQA
- Parallel circuits, pages 37, 47, GCSE Physics, Hodder, AQA
- Parallel circuits, pages 60-61, GCSE Physics; Third Edition, Oxford University Press, AQA
- Parallel circuits, pages 72-76, 78, 79, GCSE Combined Science Trilogy; Physics, CGP, AQA
- Parallel circuits, pages 74-78, 80, 81, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
Edexcel
- Parallel circuits, page 141, GCSE Physics, Pearson Edexcel
- Parallel circuits, page 75, GCSE Physics; The Revision Guide, CGP, Edexcel
- Parallel circuits, pages 188, 189, GCSE Combined Science; The Revision Guide, CGP, Edexcel
- Parallel circuits, pages 235-238, 240, GCSE Physics, CGP, Edexcel
- Parallel circuits; resistors, page 147, GCSE Physics, Pearson Edexcel