A High Power Line Carries a Current of 1 $\vec { B }$

question 12

Multiple Choice

A high power line carries a current of 1.0 kA.What is the magnitude of the $\vec { B }$ field this line produces at the ground,10 m away? (μ₀ = 4π × 10^-7 T ∙ m/A)

• A)4.7 µT
• B)6.4 µT
• C)20 µT
• D)56 µT

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