Difference between revisions of "Ohm's Law"
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| − | '''Ohm's Law''' states that "The [[Electrical Current|current]] through a [[Electrical Resistor|resistor]] at constant [[temperature]] is [[Directly Proportional|directly proportional]] to the [[Potential Difference|potential difference]] across the [[resistor]]. | + | '''Ohm's Law''' states that "The [[Electrical Current|current]] through a [[Electrical Resistor|resistor]] at constant [[temperature]] is [[Directly Proportional|directly proportional]] to the [[Potential Difference|potential difference]] across the [[resistor]]." |
===About Ohm's Law=== | ===About Ohm's Law=== | ||
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: '''Ohm's Law''' only works at low [[Electrical Current|current]] because [[Electrical Current|current]] has a [[heating]] effect on a [[Electrical Conductor|conductor]]. | : '''Ohm's Law''' only works at low [[Electrical Current|current]] because [[Electrical Current|current]] has a [[heating]] effect on a [[Electrical Conductor|conductor]]. | ||
: An ideal [[resistor]] follows '''Ohm's Law'''. | : An ideal [[resistor]] follows '''Ohm's Law'''. | ||
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| + | ===References=== | ||
| + | ====AQA==== | ||
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| + | :[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 ''Ohm's law, pages 46-7, 53, 58, 63, 76-7, GCSE Physics; Student Book, Collins, AQA ''] | ||
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| + | ====Edexcel==== | ||
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| + | :[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 ''Ohm’s Law, page 223, GCSE Physics, CGP, Edexcel ''] | ||
Latest revision as of 10:47, 24 November 2019
Contents
Key Stage 4
Meaning
Ohm's Law states that "The current through a resistor at constant temperature is directly proportional to the potential difference across the resistor."
About Ohm's Law
- Ohm's Law only applies to conductors at a constant temperature.
- Ohm's Law only works at low current because current has a heating effect on a conductor.
- An ideal resistor follows Ohm's Law.