The force per unit length between two straight conductors separated by a distance of 0.02 ~m is 2 10⁻³ ~N ~m ⁻¹ . The current in one conductor is 10 ~A and that in the other conductor is

Step-by-step solution

Force per unit length between two parallel current carrying wire is given by F= ₀ 2 I₁ I₂ r Here, ₀ 4 =10⁻⁷ NmA ⁻², r=0.02 ~m F=2 10⁻³ ~N ~m ⁻¹, I₁=10 ~A , I₂= ? So, 2 10⁻³=2 10⁻⁷ 10 I₁ 0.02 0.02 10^4=10 I₁ I₁=20 ~A