## Question

###### A current in a straight wire is 0.20 A. What is the magnitude of the $\vec{B}$ field at a point that is 30 ${cm}$ from the wire? What assumptions did you make?

A current in a straight wire is 0.20 A. What is the magnitude of the $\vec{B}$ field at a point that is 30 ${cm}$ from the wire? What assumptions did you make?

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