State 'Inverse square law of magnetism'.
A. Coulomb's inverse law of magnetism states that, "The force of attraction or repulsion between two magnetic poles is directly proportional to the product of their pole strengths and inversely proportional to the square of the distance between them and acts along the line joining the poles"
F ∝ m1m2
F ∝ r2
F = K m1m2 \r2