. Practical wireless telegraphy; a complete text book for students of radio communication . Fig. 16—Magnetic Field of Horse-shoe Magnet withCurrent Flowing in Definite Ill in Fig. 17—Showing How Magnetic Field Reverseswith Reversal of Current. The direction of the current induced inS should be observed. When the lines offorce increase through S, the induced pres-sure is counter to that which originallyflowed in winding P, but when the linesof force decrease through S, the inducedcurrent has the same direction as the orig-inal current from the battery throughwinding P. It is clear t
. Practical wireless telegraphy; a complete text book for students of radio communication . Fig. 16—Magnetic Field of Horse-shoe Magnet withCurrent Flowing in Definite Ill in Fig. 17—Showing How Magnetic Field Reverseswith Reversal of Current. The direction of the current induced inS should be observed. When the lines offorce increase through S, the induced pres-sure is counter to that which originallyflowed in winding P, but when the linesof force decrease through S, the inducedcurrent has the same direction as the orig-inal current from the battery throughwinding P. It is clear that the lines of force in Sare in the opposite direction to those whichset up the current in S. The field of forcecreated around S therefore reacts uponwinding P tending to build up a currentin opposition to that already flowing in is, the change in strength of theprimary current in P induces a secondarycurrent in S which in turn induces a backpressure in P. The induction due to thetwo circuits reacting upon each otheris called their mutual induction which is ameasurable quantity. 30. Self-induction. ^- We haveseen that the expanding field of wind-ing P induces an
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
