# Surround Ground

A $$1~\mbox{nC}$$ charge is placed inside a grounded conducting hollow sphere of radius $$10~\mbox{cm}$$ centered on the origin. If the charge is placed at $$(5~\mbox{cm},0,0)$$, what is the electric potential at $$(-5~\mbox{cm},0,0)$$?

Details and assumptions

• Let $$1/4 \pi \epsilon_0=K=9\times 10^9 ~\mbox{Nm}^2/\mbox{C}^2$$.
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