Magnetic Sources

Ampere's Law

This is "similar" to Gauss's Law: 

The line integral of B dotted into ds around a complete loop is proportional to the current I passing through that loop.

or The line integral of the dot produce of the magnetic field B and the infinitesimal line element ds around a complete loop is proportional to the current I passing through that loop.

Forces Between Conductors			Solenoid
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(c) Doug Davis, 2002; all rights reserved