| A. L. Selby - 1893 - 320 pages
...the same as that of a mass m placed at the centre of the sphere. Therefore the action of the whole sphere at an external point is the same as that of a particle of mass M placed at its centre. This proposition holds also when each thin shell is uniform,... | |
| Joseph John Thomson - 1893 - 688 pages
...potential is (C* 4. R^ fi • Thus the magnetic effect of the currents at a point outside the sphere is the same as that of a small magnet at the centre, with its axis at right angles to the axis of rotation and the external magnetic field, and whose moment... | |
| University of Sydney - 1912 - 1050 pages
...small plane circular current, at distances which are great compared with the dimensions of the circuit, is the same as that of a small magnet at the centre of the circle, whose axis is normal to the plane of the circuit, when the magnetic moment is equal... | |
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