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AIIMS 2016
Exam
AIIMS
Year
2016
Subject
Physics
Chapter
Electrostatics

AIIMS 2016 · Physics · Electrostatics

Two charged spheres separated by a distance ' d ' exert some force...

Two charged spheres separated by a distance ' dd ' exert some force on each other. If they are immersed in a liquid of dielectric constant 2 , then what is the force exerted, if all other conditions are same?

Options

  1. AF/2F / 2
  2. BFF
  3. C2F2 F
  4. D4F4 F

Correct answer

A. F/2F / 2

Step-by-step solution

Given: Distance between two charges =d=d and dielectric constant (k)=2(k)=2. Force between two charged spheres (F)=14πε0×q1q2r2(F)=\frac{1}{4 \pi \varepsilon_0} \times \frac{q_1 q_2}{r_2}, where ε0\varepsilon_0 is permitivity of free space. Force for a medium with dielectric constant kk, F′=1k×14πε0×q1q2r2=Fk=F2F^{\prime}=\frac{1}{k} \times \frac{1}{4 \pi \varepsilon_0} \times \frac{q_1 q_2}{r^2}=\frac{F}{k}=\frac{F}{2}
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