A ring of radius R is having charges qand3q distributed on its two half parts . The electric potential at a point on the axis √3R from its centre is
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(b) 2kqR
Explanation : Every point on ring is at a same distance from p
d=R2+3R2−−−−−−−−√=2R
V=kq2R+k3q2R=2kqR.
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