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(a) Obtain an expression for the equival...

(a) Obtain an expression for the equivalent capacitance when three capacitors are connected in parallel
(b) An electron revolves around the nucleus of hydrogen atom in a circular orbit of radius `5 xx 10^(-11)m.`
Calculate :
(i) intensity of electric field of the nucleus at the position of the electron.
(ii) electrostatic potential energy of the hydrogen nucleus and electron system.

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