Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 609
of the gal-vanometer needle (§ 630). 681. Faradays Disk Dynamo, One of Faradays earliest ex-periments in electromagnetic indtiction was to rotate a copperdisk between the poles of a magnet, the plane of the disk being 590 ELECTROMAGNETIC INDUCTION. perpendicular to the field (Fig. 436). A… … Fig. 436. each radius of the disk cuts the lines of the field at the rateof ■jrr^nH per second, where ttT^ is the area of the disk, H is thestrength of the field assumed uniform, and n is the number ofrevolutions per second of the disk. Thus £( volts) vfnH 10° This arrangement made the first…
Physics
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