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A charge is kept close to a metal sphere of radius R.What is the potential at point P at a distance R/2 above the centre due to charges induced on the sphere?
anything multiplied by zero will give always a zero result....
potential remains same inside a conducting sphere...
TOTAL V at centre =kq/x+kQ/R-kQ/R=kq/x
Q=CHARGE INDUCED..
now V at centre=V at point P
V at P=kq/(R/2^2+x^2)^1/2 +V'
V'=V by induced charges at P
so kq/x=V'+ kq/(R/2^2+x^2)^1/2
we get V'
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