 #1
RodolfoM
 8
 2
 Homework Statement:

In the following figure, there is a massive sphere A, concentrical to the spherical shells B and C. The spherical shell B has a positive net charge ##q_B##, while C is neutral and the sphere A is connected to the ground through a thin wire, with neglectable capacitance, which doesn't touch the shells B and C. You should find:
a) The induced charges on the surfaces of the sphere A and the shells B and C.
b) The new charge of the sphere A after the shell C becomes grounded.
 Relevant Equations:

Gauss's law:
##\oint E dA=Q_{enc}/\varepsilon##
Poisson's Equation.
My first attempt at solving this was to calculate the induced charge in A by making ##V=0##:
##\frac{q_{A}}{4πεR_{1}}+\frac{q_{B}}{4πεR_{3}}=0##
##q_{A}=q_{B}\frac{R_{1}}{R_{3}}##
But that's not the answer. Any help is welcome!