Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 548
the equipoten-tial surfaces containing the pointscompared. The fewer these lines per unit area, the less the localintensity of the force. The strength of field between the poles of amagnet may be expressed in dynes, but now it is more commonamong electricians to express this strength by the number… … Fig. 412. 528 ETHER DYNAMICS. said to pass through an area of 1 cm^ held perpendicularly to theselines. 497. Strength of magnetic field by the method of oscillations. This method of comparing the strength of the magnetic field atdifferent points in it depends on the principle that a pendulummakes…
Physics
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