Questions
If on the concentric hollow spheres of radii and the charge is distributed such that their surface densities are same then the potential at their common centre is
detailed solution
Correct option is D
Let say charge q1 is on inner sphere and charge q2 is on outer sphere q1+q2=Q and q14πr2=q24πR2 (given) q1=Qr2R2+r2 and q2=QR2R2+r2 Potential at common centre=V=V1+V2 =14π∈0Qr2R2+r2r+QR2R2+r2R=QR+r4π∈0R2+r2∵Potential inside shell = potential on the shellTalk to our academic expert!
Similar Questions
1000 small water drops each of radius r and charge q coalesce together to form one spherical drop. The potential of the big drop is larger than that of the smaller drop by a factor of
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