Three Very Long, Straight, Parallel Wires Each Carry Currents Of 4.0

question 100

Multiple Choice

Three very long, straight, parallel wires each carry currents of $4.0 \mathrm {~A}$ , directed out of the page as shown in the figure. These wires pass through the vertices of a right isosceles triangle as shown. Assume that all the quantities shown in the figure are accurate to two significant figures. What is the magnitude of the magnetic field at point $P$ at the midpoint of the hypotenuse of the triangle? ( $\left. \mu _ { 0 } = 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } \right)$

• A) \(4.4 \mu \mathrm { T }\)
• B) \(57 \mu \mathrm { T }\)
• C) \(18 \mu T\)
• D) \(130 \mu \mathrm { T }\)
• E) \(1.8 \mu \mathrm { T }\)

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