Alternating Electric Currents by Edwin James Houston

By Edwin James Houston

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Counter impressed is, electromotive produced by inducsometimes called the counter force; and, since it is tion, it is conse- electromotive force of self-induction. ELECTROMOTIVE FORCES. The intensity of the counter E. 35 M. F. so depends upon the rate of change in| the amount of flux passing through the set up, loop at any moment, and not on the total amount of flux. Consequently, when the direction of current is reversed, as in an alternating -current circuit, the direction of the flux is reversed, occurs in the rate at and a rapid change which the flux is passing through the loop.

F. to such loop, will tend to set up in the loop an E. M. F. oppo- sitely directed to that of the E. The induced M. F. quently, called a E. M. F. counter impressed is, electromotive produced by inducsometimes called the counter force; and, since it is tion, it is conse- electromotive force of self-induction. ELECTROMOTIVE FORCES. The intensity of the counter E. 35 M. F. so depends upon the rate of change in| the amount of flux passing through the set up, loop at any moment, and not on the total amount of flux.

Is opposite to the M. F. which was re- direction of the E. quired to produce the flux that caused it. In order to distinguish the E. M. F. pro- ducing the flux, from the E. M. F. produced by the flux, the former is called the M F In other words, the impressed E. passage of magnetic flux through a con. ducting loop, consequent upon the application of an E. M. F. to such loop, will tend to set up in the loop an E. M. F. oppo- sitely directed to that of the E. The induced M. F. quently, called a E.

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