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
  • A$\frac{{Qln2}}{{4\pi {\varepsilon _0}L}}$
  • B$\;\frac{Q}{{8\pi {\varepsilon _0}L}}$
  • C$\;\frac{{3Q}}{{4\pi {\varepsilon _0}L}}$
  • D$\;\frac{{3Q}}{{4\pi {\varepsilon _0}Lln2}}$
JEE MAIN 2013, Medium
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