A charge $Q$ is uniformly distributed over a long rod $AB$ of length $L$ as shown in the figure. The electric potential at the point $O$ lying at distance $L$ from the end $A$ is

Question

${Q \over {8\pi {\varepsilon _0}L}}$

${{3Q} \over {4\pi {\varepsilon _0}L}}$

${Q \over {4\pi {\varepsilon _0}L\,\ln \,2}}$

${{Q\ln \,2} \over {4\pi {\varepsilon _0}L\,{}^s}}$

Solution

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