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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The Answer of 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.

Two Long Parallel Wires Separated By 7.5 cm7.5 \mathrm {~cm}7.5 cm Each Carry 3.3 A3.3 \mathrm {~A}3.3 A

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