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Question: Answered & Verified by Expert
Calculate potential energy of a point charge –q placed along the axis due to a charge +Q uniformly distributed along a ring of radius R.
ChemistryCapacitanceNEET
Options:
  • A $\frac{qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/{{R}^{2}}}}$
  • B $\frac{-qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/{{R}^{2}}}}$
  • C $\frac{-qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+2{{z}^{2}}/{{R}^{2}}}}$
  • D $\frac{qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/2{{R}^{2}}}}$
Solution:
1874 Upvotes Verified Answer
The correct answer is: $\frac{-qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/{{R}^{2}}}}$
Correct Option is : (B)
$\frac{-qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/{{R}^{2}}}}$

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