A High Power Line Carries a Current Of $1.0 \mathrm { kA }$

question 127

Multiple Choice

A high power line carries a current of $1.0 \mathrm { kA }$ . What is the strength of the magnetic field this line produces at the ground, $10 \mathrm {~m}$ away? $\left( \mu _ { 0 } = 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } \right.$ )

• A) \(6.4 \mu \mathrm { T }\)
• B) \(20 \mu \mathrm { T }\)
• C) \(4.7 \mu \mathrm { T }\)
• D) \(56 \mu \mathrm { T }\)

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