Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 29
Out In Fig. 5.—Direction of an electric current. 7. Magnetic Field Surrounding a Conductor Carrying Current.—A conductor carrying current is surrounded by a magneticfield represented by lines of force as shown in Fig. 6. To deter- … Current Down. Current Up Fig. 6.—Field surrounding a conductor carrying current. mine the direction of these lines the following rule is used: Ifa corkscrew is screwed into the conductor in the direction ofthe current then the head of the corkscrew has to be turned inthe direction of the lines of…
Electrical engineering
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