CUET · PHYSICS · PYQ PAPER 2023
A point charge is placed at any point on the axis of an electric dipole at some large distance, experiences a force F. The force acting on the point charge when it's distance from the dipole is halved will be
- A 4F
- B 8F
- C F/8
- D F/4
Answer & Solution
Correct Answer
(B) 8F
Step-by-step Solution
Detailed explanation
\(F \propto \frac{1}{r^3}\) \(r' = r/2\) \(F' \propto \frac{1}{(r/2)^3} = \frac{8}{r^3}\) \(F' = 8F\)
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