A Long Straight Wire Carrying a 4-A Current Is Placed $x$

question 85

Multiple Choice

A long straight wire carrying a 4-A current is placed along the $x$ -axis as shown in the figure. What wire? $\left( \mu _ { 0 } = 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } \right)$

• A) \(20 \mu \mathrm { T }\)
• B) \(30 \mu \mathrm { T }\)
• C) \(50 \mu \mathrm { T }\)
• D) \(40 \mu \mathrm { T }\)
• E) \(60 \mu \mathrm { T }\)

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