A) zero
B) \[\frac{8{{q}^{2}}}{4\pi {{\varepsilon }_{0}}r}\]
C) \[\frac{8q}{4\pi {{\varepsilon }_{0}}r}\]
D) \[\frac{64{{q}^{2}}}{4\pi {{\varepsilon }_{0}}r}\]
Correct Answer: B
Solution :
Work done \[=-\text{ }\Delta U\text{ }=\text{ }{{U}_{i}}-{{U}_{f}}\] \[=\frac{8k{{q}^{2}}}{r}-O\] \[=\frac{8{{q}^{2}}}{4\pi {{\varepsilon }_{0}}r}\]You need to login to perform this action.
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