A text-book on chemistryFor the use of schools and colleges . 174 ELECTRO-MAGNETIC ROTATION. Fig. As action and reaction are always equal and contrary,it is obvious that if a conductingwire be movable and the magnetstationary, the latter can be madeto impress motions on the wires may be madeto revolve around the poles of amagnet, or the pole of a magnetaround a conducting wire. Thus,in a glass cup, Fig. 145, let a mag-net, n, be fixed vertically,.and thecup filled with mercury. By meansof a loop, a, let a conducting wire, 5,be suspended, having perfect free-dom of motio
A text-book on chemistryFor the use of schools and colleges . 174 ELECTRO-MAGNETIC ROTATION. Fig. As action and reaction are always equal and contrary,it is obvious that if a conductingwire be movable and the magnetstationary, the latter can be madeto impress motions on the wires may be madeto revolve around the poles of amagnet, or the pole of a magnetaround a conducting wire. Thus,in a glass cup, Fig. 145, let a mag-net, n, be fixed vertically,.and thecup filled with mercury. By meansof a loop, a, let a conducting wire, 5,be suspended, having perfect free-dom of motion. If an electric cur-rent is made to pass down thiswire through the mercury and es-cape by the path c?, the wire rotates round the pole n asi^r. 145. long as the current passes. From this and similar experiments it therefore ap-pears that the force exerted between aconducting wire and a magnet is not adirect attractive or repulsive power, butone continually tending to turn themovable body round the stationary one,deflecting it continually and acting in atangentialdirection. Hence it is some-times
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