Coulomb’s law is applicable for __________.

Correct option is D

The correct answer is: (d) between two point charges
Explanation:
· Coulomb's Law gives the electrostatic force between two stationary point charges in vacuum or air.
· It states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
· This law does not accurately apply to distributed charges as it assumes charges to be concentrated at a point.
Information Booster:
· Formula: F=k⋅q1⋅q2r2F = \frac{k \cdot q_1 \cdot q_2}{r^2}F=r2k⋅q1​⋅q2​​, where k is Coulomb’s constant.
· Valid only in electrostatic conditions, not for moving charges.
· It’s a vector quantity, and the force acts along the line joining the two charges.
· Unit of charge is Coulomb (C).
· Applies best in vacuum or air where permittivity is constant.
· In SI units, k=9×109 Nm2/C2k = 9 \times 10^9 \, \text{Nm}^2/\text{C}^2k=9×109Nm2/C2.