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Abhishek Doyal · Answer

Abhishek doyal IIT Bombay Askiitian tutor

askiitian expert Rahul iitd · Answer

The energy density, or energy per unit volume, $\frac{dU}{dV}$ , of theelectrostatic fieldof a continuous charge distribution is:

$u_e = \frac{dU}{dV} = \frac{1}{2} \varepsilon_0 \left|{\mathbf{E}}\right|^2.$

Electric field at a distance r from the sphere is

Now for finding electrostatic energy we need to integrate energy density over the whole space from R to infinity to get the answer using the E above mentioned.

Thanks and Regards

Rahul kumar

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