Two Long Parallel Wires Separated By $7.5 \mathrm {~cm}$ Each Carry $3.3 \mathrm {~A}$

question 151

Short Answer

Two long parallel wires separated by $7.5 \mathrm {~cm}$ each carry $3.3 \mathrm {~A}$ in opposite directions. $\left( \mu _ { 0 } = \right.$ $4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A }$ )
(a) What magnetic force per length acts on each of the wires? Is it attractive or repulsive?
(b) Find the magnitude of the magnetic field midway between the two wires.

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