Look up Ampere's law for the magnetic field around a straight wire.
You can find it at
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magcur.html
Solve for the unknown distance, r. Show your work if you need additional assistance.
A long, straight wire carries a current of 48 A. The magnetic field produced by this current at a certain point is 6.5 10-5 T. How far is the point from the wire?
1 answer