STANDARDPhysics-Electrostatics
STANDARD Physics Coulomb's Law MCQ Question
Type: MCQ-conceptual-Medium
Two point charges placed at a distance 'r' in air exert a force 'F'. The distance at which they exert same force when placed in a certain medium (dielectric constant K) is :-
A
rK
B
r/K
C
r/√K
D
r√K
Correct Answer
Option C
Detailed Explanation
In a medium with dielectric constant K, the force between charges is reduced by a factor of K. To maintain the same force, the distance must be reduced by a factor of √K.
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