Four metallic plates, each with a surface area of one side A, are placed at a distance d apart from each other. The two inner plates are connected to point A and the other two plates to another point A as shown in fig. Then the capacitance of the system is

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The two condensers in the middle are connected together .i.e., the connected plates act as a single conductor. In this way, effectively there are two capacitors connected inparallel. The capacity of each capacitor is given $$byC=$$ε$$0AdNet$$ capacitance between A and B is given $$byCAB=C+C=2$$ε$$0A/d$$

Four metallic plates, each with a surface area of one side A, are placed at a distance d apart from each other. The two inner plates are connected to point A and the other two plates to another point A as shown in fig. Then the capacitance of the system is

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