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The electric potential in V (r, θ) outside a hollow empty sphere of radius 1 satisfies the Laplace equation.

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\((30\) marks) The electric potential in \(V(r, \theta)\); mtside a hollow empty sphere of radius 1 satisfies the Laplace equation. On the surface of the sphere, \(V(1, \theta)=1-\cos 2 \theta\). Given that \(\lim _{r \rightarrow \infty} V(r, \theta)=0\), find \(V(r, \theta) .\)

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