A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 1022
ws from back to front and in /, g and h from front to back. Now,taking into account the direction of the magnetic field and applyingthe left-hand rule (p. 968), it will be seen that the forces upon thearmature conductors are in such a direction that the armature isurged to rotate in an… … Fio. 940.—Drum wound motor armature. 998 MAGNETISM AND ELECTRICITY chap. direction of rotation will remain the same. In order to reversethe direction of rotation of the motor either the direction of thefield, or that of the current in the armature must be reversed, butnot both. For the direction of…
Physics
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