MHT CET 2022 Physics question

Initially 'n' identical capacitors are joined in parallel and are changed to potential 'v'. Now they are separated and joined in series. Then

(A)potential difference becomes 'nv' and energy remains the same.Correct
(B)potential difference 'nv' and energy increases 'n' times.
(C)potential difference and total energy of combination remains same.
(D)potential difference remains the same and the energy increases n times.

Answer: (A)

Solution

Each capacitor (capacitance ) is charged to potential , so it holds charge and energy . Total initial energy . When separated and joined in series (positive plate of one to negative plate of next), the charge on each remains and the potential differences

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Question ID VK-093460