Two identical capacitors are joined in parallel and charged to a po...

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Two identical capacitors are joined in parallel and charged to a potential \( V \). They are then disconnected from the battery
\( \mathrm{P} \) and connected to each other in series. The positive plate of one being connected to the negative of the other and two
W outer plates terminals are left open. Which of the following statement is correct ?
(A) Charge on the plates connected to each other is reduced to zero
(B) Charge on the outer plates is doubled
(C) Potential difference between outer plates terminals is \( 2 \mathrm{~V} \)
(D) The energy stored in the system is doubled
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