Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 155
Fig. 97. Hence Whence H sin <^ =tan ^ = 2M cos <^ r^ (ii) When OP is at right angles to the deflected positionof the suspendedmagnet as in Fig. »9^98. In this case^=90° and sin6 = 1 Thus 2M sin ^ = Hi* … These two posi-tions are spoken ofas the tangent andsine positions re-spectively. If the distant mag-net be used in the broadside-on position Fig. 98. similar results can be obtained but the couple due to it will be MMsin5/r instead of2MMBin 6jr^, and hence we shall obtain Mtan 01=^ O. E. 10 146…
Electricity · Magnetism
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