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At What Distance from a Long Straight Wire Carrying a Current

Question 93

Multiple Choice

At what distance from a long straight wire carrying a current of 5.0 A is the magnitude of the $\vec { B }$ field due to the wire equal to the Earth's $\vec { B }$ field of about 5.0 × 10^-5 T? (μ₀ = 4π × 10^-7 T ∙ m/A)

A) 1.0 mm
B) 1.0 cm
C) 2.0 cm
D) 3.0 cm
E) 4.0 cm

At What Distance from a Long Straight Wire Carrying a Current

Multiple Choice

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