Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 240
pivot which carries a small mag-netic needle. A light pointer isattached to this and moves, as theneedle swings, over the graduatedcircle; this pointer is usually fixedat right angles to the axis of the magnet. The circle is usually graduated so that when the axisof the magnet is in the plane of… … Fig. 145. 153-154] MEASUREMENT OF CURRENT 231 The magnet and pointer are protected from air currents bya transparent cover. In a sine galvanometer a second horizontal circle is usuallyattached to the base of the instrument, and on this the anglethrough which the coil is turned can be read. The ends…
Electricity · Magnetism
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