2021 · Q69
Which one of the following statements regarding force is correct?
General SciencePhysics
- AA positive force implies attractive nature.
- BA negative force implies repulsive nature.
- CA positive force can be both attractive and repulsive in nature.
- DA negative force implies attractive nature.
Explanation
By the sign convention in Coulomb’s law, F = kq₁q₂/r², a negative force denotes attraction (unlike charges pulling together) and a positive force denotes repulsion (like charges pushing apart). “A negative force implies attractive nature” therefore states the convention correctly. Options (A) and (B) invert it, and (C) contradicts the convention. Hence (D) is correct.