A laboratory manual in physics, to accompany Black and Davis' "Practical physics for secondary schools," (1913)
Black, Newton Henry, 1874- [from old catalog] · New York, The Macmillan company · leaf 92
( + ). Con-nect to the galvanometer (now without any shunt) a coil ofmany turns (say 800 turns of No. 28copper wire). (a) Now move the coil downwardquickly over the N-pole of the barmagnet (Fig. 46), and record thedirection and amount of the deflec-tion. From this deflection, deter-mine the… … Fig. 46 78 LABORATORY MANUAL (h) Quickly remove the coil from the magnet and recordthe direction and amount of the deflection. Compare thedirection and amount of the current thus induced with thatin part (a). What is the polarity of the end of the coilthat last leaves the magnets N-pole ? (tf)…
Physics
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