Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 433
ways tends to set itselfin the position in which the maximum number of lines offorce ivillpass through it. 500. Magnetic Conditions of a Helix. Ampere showed thatthe magnetic power of a wire carrying a current could beintensified by winding it into the form of a sj^iral. Themagnetic properties of… … Fig. 50u.—A helix carr^ing a current be-haves like a bar-magnet. lead-pencil. Connect the ends of the wire with the poles of a voltaic cell, and with a mag-netic needle explore the regionsurrounding it. Next make a hehx some-what larger in diameter, say-about three-quarters of an inch,and place it…
Physics
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