Field of a Long Wire: the Magnetic Field at a Distance

question 62

Multiple Choice

Field of a long wire: The magnetic field at a distance of 2 cm from a current carrying wire is 4 μT. What is the magnetic field at a distance of 4 cm from the wire?

• A) 1/2 µT
• B) 1 µT
• C) 2 µT
• D) 4 µT
• E) 8 µT

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