Question Detail
Question
Force per meter on two wires carrying a current of 1A each, placed 1m apart, is equal to
Correct Answer
Option C is the correct answer.
Detailed Explanation
F/L = μ0I1I2/(2πd) = (4π×10⁻⁷)(1)(1)/(2π×1) = 2×10⁻⁷ N/m.
Hint
Apply the standard formula for force per unit length between two parallel current-carrying wires.