If on the concentric hollow spheres of radii r and R (> r) the charge Q is distributed such that their surface densities are same then the potential at their common centre is:
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
QR2+r24πε0(R+r)
b
QRR+r
c
Zero
d
Q(R+r)4πε0R2+r2
answer is D.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
q1+q2=Q and q14πr2=q24πR2 q1=Qr2R2+r2 and q2=QR2R2+r2 Potential at common centre 14πε0Qr2R2+r2r+QR2R2+r2R=Q(R+r)4πε0R2+r2