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The formula for a capacitor discharging is $Q=Q_0e^{-\frac{t}{RC}}$ Where $Q_0$ is the maximum charge. But what property defines the maximum charge a capacitor can store? If it depends on capacitance then that means it depends on the voltage you put across the capacitor, but how can any capacitor "cope" with any voltage? |
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The maximum charge a capacitor stores depends on the voltage $V_0$ you've used to charge it according to the formula: $$ Q_0=CV_0 $$ However, a real capacitor will only work for voltages up to the breakdown voltage of the dielectric medium in the capacitor. So in reality, for every capacitor there is a maximum possible charge $Q_{max}$ given by: $$ Q_{max}=CV_{max} $$ where $V_{max}$ is the breakdown voltage of the dielectric medium in the capacitor. |
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