Four metallic plates each of surface area (of one side) math xmlns=...
Four metallic plates each of surface area (of one side) math xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymi mathvariant=normalA/mi/math, are placed at a distance math xmlns=http://www.w3.org/1998/Math/MathMLmi mathvariant=normald/mi/math apart from each other. The two plates are connected to a point math xmlns=http://www.w3.org/1998/Math/MathMLmi mathvariant=normalP/mi/math and the two inner plates to another point math xmlns=http://www.w3.org/1998/Math/MathMLmi mathvariant=normalQ/mi/math as shown in figure:
img src=https://penpencil-static-content.s3.ap-south-1.amazonaws.com/5eb393ee95fab7468a79d189/btzkwit2q2ywh70fbsvf9lx8e.png width=343 height=91 /
Then the capacitance of the system is
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