Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 278
the center of thiscoil or helix is a small magnetic needle. If the electriccurrent is sent around the coil in the direction of thearrow, a magnetic field will be created, the south pole ofwhich is on the side of the helix toward the observer, andthe magnetic needle will be deflected so that its… … Line ., <T
Physics
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