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Solution


Q.

The electrostatic potential in a charged spherical region of radius r varies as V=ar3+b, where a and b are constants. The total charge in the sphere of unit radius is α×πaε0. The value of α is _________.  

(Permittivity of vacuum is ε0)                                   [2026]
1 − 12  
2 − 8  
3 − 9  
4 − 6  

Ans.

(1)