Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 32
Fig. 10.—Force on a conductor carrying current in a magnetic field.Left Hand Ruel: thumb—force; forefinger—lines of force; middle finger—current. to the current and to the strength of the field. Tbe directionof this force may be determined by what is called the left-handrule which states that if… … Fig. 11.—Moving coil ammeter. middle finger of the left hand are placed at right angles to oneanother as in Fig. 9 so as to represent three coordinates in space,with the thumb pointed in the direction of the mechanical forceand the forefinger in the direction of the lines of force, then themiddle…
Electrical engineering
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