A parallel plate condenser of capacity \( \mathrm{C} \) is connecte...

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A parallel plate condenser of capacity \( \mathrm{C} \) is connected to a battery and is charged to potential V. Another condenser
P of capacity \( 2 \mathrm{C} \) is connected to another battery and is

W. charged to potential \( 2 \mathrm{~V} \). The charging batteries are removed and now the condensers are connected in such a way that the positive plate of one is connected to negative plate of another. The final energy of this system is-
(a) zero
(b) \( \frac{25 \mathrm{CV}^{2}}{6} \)
(c) \( \frac{3 \mathrm{CV}^{2}}{2} \)
(d) \( \frac{9 \mathrm{CV}^{2}}{2} \)
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