66Q1) The potential is the same as that because of a point charge q at the center.
Q1. A neutral solid sphere has an unsymmetrical cavity in which in charge q is placed. Find potential at P.
Q2. 
-
UP 0 DOWN 0 1 5
5 Answers
66
106sir please help
second one i got 8R/15 which is der in options.. but i couldnt see any symmetry...
I got answer after 1 page calculation involving 6 variables [2]
11 : q charge [ inside ] induces -q on inner surface of cavity and so +q appears on the sphere [ I'M ASSUMING ITS CONDUCTING..IF IT IS NON CONDUCTING THEN AUTOMATICALLY SOME LESSER MAGNITUDE OF CHARGE [ < q ] GETS INDUCED....this +q charge acts as a POINT CHARGE for the point P outside...i hope u got it !
Ans 2 : the shape is like a prism rt ashish..so there WILL be a symmetry cutting through the prism strting with the side edge..THEN YOU CAN SOLVE IT EASILY..
1second one we can remove the straight wire joining the vertex opposite AB.