Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 159
onmechanical principles, and do not, except in the expressionfor B in terms of M and r, involve any magnetic theory. Consider a rod ACB (Fig. 102) pivoted at its centre sothat it can turn in a vertical plane, and let two strings beattached to it at A. Let one of these strings carry a 92-93]… … P to the second string. The rod wUl be deflected by thisdeflecting force, and if a graduated circle be attached to aboard behind the rod with its centre at C, the angle ofdeflexion can be measured. This angle of deflexion which wewill call ^, will depend on the magnitude and direction of P,and we…
Electricity · Magnetism
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