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The magnetic field at the center of a 1.3-cm-diameter loop is 2.8 mT. a) What is...

The magnetic field at the center of a 1.3-cm-diameter loop is 2.8 mT.

a) What is the current in the loop?

b) A long straight wire carries the same current you found in part a. At what distance from the wire is the magnetic field 2.8 mT ?

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