A capacitor of capacity $C$ is charged to a steady potential difference $V$ and connected in series with an open key and a pure resistor $'R'$. At time $t = 0$, the key is closed. If $I =$ current at time $t$, a plot of log $I$ against $'t'$ is as shown in $(1)$ in the graph. Later one of the parameters i.e. $V, R$ or $C$ is changed keeping the other two constant, and the graph $(2)$ is recorded. Then
Diffcult
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It is discharging of capactior
$I=\frac{E}{R} e^{-t / R C}$
$\log I=\log \frac{E}{R}-\frac{t}{R C}$
Intercept is constant $\Rightarrow \mathrm{E} \& \mathrm{R}$ constant
$|$slope $|$ dercrease $\Rightarrow C \uparrow$
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