Directly proportional
What Directly proportional means in Combined Science GCSE, as defined for AQA.
Definitions of Directly proportional
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Reference: AQA
Describes how resistance relates to length for a metallic wire kept at constant temperature, so that doubling the length doubles the resistance.
A relationship where doubling the force doubles the extension, shown by a straight graph through the origin up to the limit of proportionality.
Extension is proportional to force, so doubling the force doubles the extension while the limit of proportionality is not exceeded.
Topics that use Directly proportional
- Current, resistance and potential difference (AQA GCSE)
- Forces and elasticity (AQA GCSE)
Related terms
- Ammeter
- Ampere
- Balanced forces
- Bending
- Circuit construction from diagrams
- Compression
- Current
- Deformation of stationary objects
Using Directly proportional in the exam
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