Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 145
o B. The force on a pole mwould be mRy that on a pole — m would be — mR, or mRacting from B \xi A. A magnet has two poles, letus suppose m is the strength ofone pole, - m that of the other.Then the force on the one polewill be mR^ that on the other — m!R^ and the force on themagnet will be the… … 136 MAGNETISM [CH. X and a couple which tends to turn the magnet until its axispoints in the direction of H. We can shew however by experiment that in a case suchas this the resultant is a couple only, the resultant force iszero; from this it follows that m is equal to m, or thestrengths of the two…
Electricity · Magnetism
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