Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 52
ed in termsof a constant K^ and the deflection d. If the direction of the current changes, the polarity of bothcoils will change, and the deflection will still remain thesame. For this reason, as previously stated, the instrumentwas used for many years to measure alternating currents.At present,… … Fig. 44. — Electro-dynamometer. ELECTRO-MA G METISM 31 TJie Effect of an Iron Core in a Helix. Experiment 16. Pass a current of electricity of about 5 amperesthrough a helix, as in Fig. 40, so that it will just deflect a small compassneedle placed at some distance from it, say a foot. Introduce a…
Electricity · Electrical engineering
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