1i have posted complete question. its from d.c pandey.
no other information is given in question
The conducting, concentric , hollow spheres A and B have radii a and b
respectively, with A inside B. Their common potential is V. A is now given some charge such that its potential becomes zero. The potential of B now will be ????????????
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7 Answers
62dude.. i could not figure the exact set up of this question..
could u explain it again?
162EDITED TO CORRECT MY MISTAKE
wanst that unclear.. sorry dude.. just was not in my mind :)
let charges be q on inner and r on outer shell
kq/b+kr/b=kq/a +kr/b = V
=>q=0!
so kr/b=V
if we earth it or make potential at "a" zero, then let q1 flow to it..
potential at a will be kq1/a+kr/b = 0
q1=-r.a/b
so potential at b will be
kq1/b + kr/b =
-kra/b2+kr/b
kr/b{-a/b+1}
V(1-a/b)
=V(b-a)/b
62sorry dude u are right.. i made a stupid damn mistake last nite.. i think i needed more sleep [1]
Now i hope this is correct .. just check it...