A 100-M-Long Wire Carrying a Current of 4

question 55

Multiple Choice

A 100-m-long wire carrying a current of 4.0 A will be accompanied by a magnetic field of what strength at a distance of 0.050 m from the wire? (magnetic permeability in empty space µ₀ = 4p x 10^-7 T*m/A)

• A)4.0 x 10^-5 T
• B)2.0 x 10^-5 T
• C)1.6 x 10^-5 T
• D)zero

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