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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class11  >>  Units and Measurement
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A parallel plate capacitor c with plates of unit area and separation d is filled with a liquid of dielectric constant $k=2$ The level of the liquid is$\large\frac{d}{3}$ initially . Suppose the liquid level decreases at constant speed V, the time constant as a function of time t is

$\begin{array}{1 1} \frac{6 \in_0 R}{5d+3vt} \\ \frac{6 \in_0 R}{5d-3vt} \\ 0 \\ none\; of\; the\; above \end{array} $

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