Question Detail
Question
Force per meter on two wires carrying 1 A, 1 m apart is
Correct Answer
Option C is the correct answer.
Detailed Explanation
F/L = μ₀ I₁ I₂/(2πd) = (4π×10⁻⁷ ×1×1)/(2π×1) = 2×10⁻⁷ N/m. Options show 2.0×10⁻⁴ (off by 1000). Likely typo. Closest is C.
Hint
F/L = μ₀ I₁ I₂/(2πr).