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in 1 of the question of h c verma numbered61: "A spherical capacitor is made of two conducting spherical shells of radii 'a' and 'b'. the space between the shells is filled with a dielectric of dielectric constant 'k' upto a radius 'c'. calculate the capacitance?" i hav refered al possible solutions of h c verma and also askd as many colleagues and teachers as possible but i couldnt understand why we take the two capacitors in parallel thought i feel it must b taken in series so as to get answer y do we take in parallel plz answer

in 1 of the question of h c verma


numbered61:


"A spherical capacitor is made of two conducting spherical shells of radii 'a' and 'b'. the space between the shells is filled with a dielectric of dielectric constant 'k' upto a radius 'c'. calculate the capacitance?"


i hav refered al possible solutions of h c verma and also askd as many colleagues and teachers as possible but i couldnt understand why we take the two capacitors in parallel thought i feel it must b taken in series so as to get answer


y do we take in parallel plz answer

Grade:12

1 Answers

Badiuddin askIITians.ismu Expert
147 Points
11 years ago

Dear babu

here in this case we will consider capacitor cac and cbc in series

Cac =4πεack/(c-a)

Cbc =4πεac/(c-b)

 

so   1/C = 1/Cac   + 1/Cbc

put the value this will give desired result.

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Badiuddin

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