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NEET
Exam
NEET
Subject
Physics
Chapter
Capacitance

NEET · Physics · Capacitance

Calculate potential energy of a point charge –q placed along the...

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.

Options

  1. AqQ4πεo1+z2/R2\frac{qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/{{R}^{2}}}}
  2. B−qQ4πεo1+z2/R2\frac{-qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/{{R}^{2}}}}
  3. C−qQ4πεo1+2z2/R2\frac{-qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+2{{z}^{2}}/{{R}^{2}}}}
  4. DqQ4πεo1+z2/2R2\frac{qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/2{{R}^{2}}}}

Correct answer

B. −qQ4πεo1+z2/R2\frac{-qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/{{R}^{2}}}}

Step-by-step solution

Correct Option is : (B)
−qQ4πεo1+z2/R2\frac{-qQ}{4\pi {{\varepsilon }_{o}}\sqrt{1+{{z}^{2}}/{{R}^{2}}}}
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