1.

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.                     \[\frac{2{{\varepsilon }_{0}}A}{d}\]                      
B.            \[\frac{3{{\varepsilon }_{0}}A}{d}\]
C.                    \[\frac{3{{\varepsilon }_{0}}A}{d}\]
D.                                      \[\frac{{{\varepsilon }_{0}}A}{d}\]
Answer» B.            \[\frac{3{{\varepsilon }_{0}}A}{d}\]


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