At the centre of a half ring of radius $R=10 \mathrm{~cm}$ and linear charge density $4 \mathrm{n} \mathrm{C} \mathrm{m}^{-1}$, the potential is $x \pi V$. The value of $x$ is  . . . . . 
  • A$35$
  • B$36$
  • C$37$
  • D$38$
JEE MAIN 2024, Diffcult
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