A capacitor is made of a flat plate of area A and second plate having a stair-like structure as shown in figure. The width of each plate is ‘a’ and the height is ‘b’. The capacitance of the capacitor is
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a
2A∈03(d+b)
b
A∈03d2+6bd+2b23d(b+d)(d+2b)
c
A∈0d2+2bd+b23d(d+b)(d+2b)
d
2A∈0d2+2bd+b23d(d+b)(d+2b)
answer is B.
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Detailed Solution
In Equivalent circuit C1, C2, C3 are parallel C1=A∈03d, C2=A∈03(d+b), C3=A∈03(d+2b)
A capacitor is made of a flat plate of area A and second plate having a stair-like structure as shown in figure. The width of each plate is ‘a’ and the height is ‘b’. The capacitance of the capacitor is