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Electric Current and Potential

Three uncharg...

Question

Three uncharged capacitors of capacitance $c_{1} = 1 μ F, C_{2} = 2 μ F$ and $C_{3} = 3 μ F$ are connected as shown in the figure. The potential of point A, B and D are $10$ volt, $25$ volt and $20$ volt respectively. Determine the potential at point O.

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Solution

Apply KCL;

$Q_{a} + Q_{b} + Q_{c} = 0$

$1 (10 - V) + 2 (25 - V) + 3 (20 - V) = 0$

$\Rightarrow V = 20 V$

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