Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 32
of a sphere of r cm. radius4tt _ 14rrr2 r2 As shown above, the force acting on the wire in dynes _ 2?rir = -j X 2irr X i = ($>Li. Since (B Art. 10] ELECTROMAGNETISM where (B is the flux density at the wire in lines per sq. cm., L is the length ofwire that is in the magnetic field in cm. = 2-kt… … 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…
Electrical engineering
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