Force on Parallel Wires: a Very Long Straight Wire Carries

Force on parallel wires: A very long straight wire carries a 12-A current eastward and a second very long straight wire carries a 14-A current westward. The wires are parallel to each other and are 42 cm apart. Calculate the force on a 6.4 m length of one of the wires. (μ₀ = 4π × 10^-7 T ∙ m/A)

A) 8.0 × 10^-7 N
B) 5.1 × 10^-4 N
C) 8.0 × 10^-5 N
D) 5.1 × 10^-6 N
E) 2.2 × 10^-4 N

Correct Answer:

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