Question

Two parallel wire carries current I1 and I2 are separated by distance d. Force per unit length of wire is F. Then :

• A. F ∝ d
• B. F ∝ $\frac{1}{d}$
• C. F ∝ d2
• D. F ∝ $\frac{1}{d^2}$

Answer 1

Answer: (B)

F ∝ $\frac{1}{d}$

Answer 2

The correct option is (B): F ∝ $\frac{1}{d}$.