Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 491
and themagnet, b, is suddenly inserted in the coil, the needle of thegalvanometer will be deflected; but the action is onlymomentary. The needle returns immediately to the pointof starting. When the magnet is quickly withdrawn fromthe coil the needle is deflected for an instant, but in the… … practically continuous, and if the_v can be corrected so thatpulsations of the same name will always flow in the same direction, the current thus pro-duced may be utilized. Before proceeding furtherwith the consideration of mag-neto-electric induction, it will benecessar) briefly to examine…
Physics · Lantern projection · Electric apparatus and appliances
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