Question Detail

PHY 102 Test Compilation PHY 102 19 Objective Question

Question

Force per meter on two wires carrying a current of 1A each, placed 1m apart, is equal to
Options
A 6.7 × 10⁻¹¹N
B 9.0 × 10⁻⁵N
C 2.0 × 10⁻⁷N
Correct Answer
D 3.0 × 10⁻⁴N
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.

Question Info