Gerard, Eric Mary, 1856-1916 · New York W.J. Johnston · leaf 219
hypothesis, P is attracted towards O.If the point /were at the centre of the circle, the intensitywould become , _ 27li __ Ic^ -~R-~R^ /being the length of the current. MAGNETIC POTENTIAL OF THE CURRENT. 203 If there were n circular currents, so near together thattheir mutual distances were… … ^^\ Fig. 69. Fig. 70. current. The intensity varies in inverse ratio to the dis-tance between the equipotential lines, and directly as thedensity of the lines of force. Suppose a magnet-needle of very small dimensions be 204 ELECTROMA GNE TISM. hung by a silk fibre of negligible torsion in the…
Electricity · Magnetism
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