. Practical wireless telegraphy; a complete text book for students of radio communication . through acircuit. The effects of self-induction arenoticeable only in direct current cir-cuits when the current is turned onand off, but in alternating currentcircuits they are ever present. Allconductors have self-induction, theamount depending upon their size andshape. Coiled wires have greaterself-induction than a long straightwire. The self-induction of a coil ELECTROMAGNETIC INDUCTION. 21 without an iron core is practicallyconstant. If a given coil has an ironcore, the self-induction is greater inp
. Practical wireless telegraphy; a complete text book for students of radio communication . through acircuit. The effects of self-induction arenoticeable only in direct current cir-cuits when the current is turned onand off, but in alternating currentcircuits they are ever present. Allconductors have self-induction, theamount depending upon their size andshape. Coiled wires have greaterself-induction than a long straightwire. The self-induction of a coil ELECTROMAGNETIC INDUCTION. 21 without an iron core is practicallyconstant. If a given coil has an ironcore, the self-induction is greater inproportion to the permeability* of theiron. The coefficient of self-induction orinductance is also defined as the prop-erty of a conductor by which energymay be stored up in magnetic unit of inductance is thehenry and represents the cutting of 100,000,000 lines of force when one ampereof current is turned on and off per second; that is, if one ampere is turned on andoff, in a given conductor, the electromotive force induced by the collapse of themagnetic field, equals one Fig. 18—Variation of Magnetic Field by OpposingCoils.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
