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Class 12 › Physics › Electric Charge and Field
CBSE2011Class Class 12 · Physics1 Marks · Mcq✅ Verified
Two charged spheres separated by a distance d exert some force F on each other. If they are immersed in a liquid of dielectric constant 4, then what is the force exerted, if all other conditions are same?
A. 2F
B. 4F
C. F/2
D. F/4
✅ Answer & Solution
✅ Correct Answer: D
<b>Concept:</b> Effect of dielectric medium on Coulomb force.<br><br><b>Formula:</b><br>Force in vacuum: F = (1/4ĻĪµ<sub>0</sub>) Ā· q<sub>1</sub>q<sub>2</sub>/dĀ²<br>Force in medium: F\' = F/K<br><br>where <b>K</b> = dielectric constant of the medium.<br><br><b>Given:</b> K = 4<br><br><b>Calculation:</b><br>F\' = F/K = <b>F/4</b><br><br><b>Answer:</b> Option (D) F/4
