Four plates of equal area A are separated by equal distances d and are arranged as shown in the figure. The equivalent capacity is
A
2εoAd
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B
3εoAd
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C
εoA2d
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D
εoAd
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Solution
The correct option is A2εoAd The given circuit is equivalent to a parallel combination two identical capacitors. Hence, equivalent capacitance between A and B is C = εoAd+εoAd= 2εoAd