Proportionality of charge and p.d.
What Proportionality of charge and p.d. means in Physics A-Level, as defined for AQA, OCR.
Definitions of Proportionality of charge and p.d.
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Reference: OCR
For a capacitor, the p.d. V across it is proportional to the charge Q stored, so a graph of V against Q is a straight line through the origin.
The Q and V curves have the same shape because Q = CV, so they are proportional.
Topics that use Proportionality of charge and p.d.
- Capacitor charge and discharge (A-level only) (AQA A-Level)
- Energy (OCR A-Level)
Related terms
- Area under a graph
- Area under a graph as work done
- Capacitor charging and discharging
- Determining the time constant from a graph
- Effect of larger R or C
- Exponential decay
- Exponential fall during discharge
- Gradient
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