A Student's Guide to Maxwell's Equations
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Problem 2.2

What is the change in magnetic flux through a 10 cm by 10 cm square lying 20 cm from a long wire carrying a current that increases from 5 to 15 mA?  Assume that the wire is in the plane of the square and parallel to the closest side of the square.

Give me a HINT or show me THE FULL SOLUTION!