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CBSE Class 12-science Answered

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Asked by Prashant DIGHE | 16 Mar, 2020, 10:30: PM
answered-by-expert Expert Answer
Electrostatic self energy of solid sphere or spherical shell is potential energy at surface.
 
Since for both cases, Electric field = Q / [ (4πεo) r2 ] ,
 
where Q is charge contained in solid sphere or spherical shell and r is radial distance from its centre
 
If R is radius of solid sphere or spherical shell, then potential energy on surface is defined as,
 
begin mathsize 14px style V space equals negative integral subscript negative infinity end subscript superscript R E left parenthesis r right parenthesis space d r space equals space minus integral subscript negative infinity end subscript superscript R fraction numerator Q over denominator 4 pi epsilon subscript o end fraction space fraction numerator d r over denominator r squared end fraction space equals space fraction numerator Q over denominator 4 pi epsilon subscript o end fraction space 1 over R end style
Answered by Thiyagarajan K | 17 Mar, 2020, 03:38: PM
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