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Find the equivalent capacitance between ...

Find the equivalent capacitance between A and B
(i)
Three conducting concentric shells of radii `r,2r,4r`
(ii)
An isolated ball-shaped conductor of radius `r` surrounded by an adjacent concentrc layer of dielectric `(K)` and outer radius 2r.

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DC PANDEY ENGLISH-ELECTROSTATIC POTENTIAL AND CAPACITORS-(C) Chapter exercises
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