Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 38
, the re-sistance of the shunt circuit is alwaysgreater than the resistance of the armatureand external circuit, but the strength of thecurrent flowing in the shunt coil is in factcomparatively small even in the larger typesof generators. The student may question how currentis set-up in a machine… … 28 PRACTICAL WIRELESS TELEGRAPHY. ^OLES a piece of soft iron has been magnetized, no matter how soft the iron may be, a certain num-ber of magnetic lines of force are retained when the magnetizing current has been turnedoff. These lines are known as the residual lines of force and the cores of the…
Telegraph, Wireless
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