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Grade:Upto college level

2 Answers

Abhishek Doyal
askIITians Faculty 25 Points
7 years ago
Abhishek doyal
IIT Bombay
Askiitian tutor

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askiitian expert Rahul iitd
askIITians Faculty 10 Points
7 years ago
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
askIITians faculty
IIT Delhi

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