Question:

Two identical capacitors have same capacitance C.
One of them is charged to the potential V and other
to the potential 2V. The negative ends of both are
connected together. When the positive ends are
also joined together, the decrease in energy of the
combined system is :

(1)1/4 CV²

(2) 2 CV²

(3)1/2 CV²

(4)3/4 CV²
                                                        JEE-2024         

Solution:                
Two identical capacitors have same capacitance C. One of them is charged to the potential V and other to the potential 2V. The negative ends of both are connected together. When the positive ends are also joined together, the decrease in energy of the combined system is : (1)1/4 CV² (2) 2 CV² (3)1/2 CV² (4)3/4 CV²

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