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The current on a balloon-shaped surface is zero due to the principles of electrostatics, particularly Gauss's law. When considering a closed surface like a balloon, any charges inside the surface create an electric field that induces equal and opposite charges on the surface itself. As a result, the net current flowing to or from the surface cancels out, leading to a total current of zero. Additionally, if the surface is in electrostatic equilibrium, there is no movement of charges, further ensuring that the current remains zero.

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3mo ago

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