### Charged Sphere

##### Score: 4 Points

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.

Electrostatics

#### Statistics

Tried 72

Solved 15

First Solve @135792468