Charged Sphere

A uniform solid sphere of $1$ $m$ radius has $10^{-4}$ $C$ charge. If this sphere is being shrunk by an external force and this contraction stops when the radius of the sphere is $0.5$ $m$. Find the work done by the external force against the electric field in the contraction process.

Don't insert the unit.


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Attempt 149

Solve 31

First Solve 135792468