Text: Also known as the "Law of Generator Action" and as "Faraday's Law." If there is relative motion between an electrical conductor and a magnetic field, such that the conductor cuts flux, an electromotive force (q.v.) will be induced in the conductor. The amount of the induced electromotive force will depend upon the strength of the magnetic field, upon the speed of cutting, upon the length of the conductor cutting the field and upon the direction of motion between the conductor and the field. Thus the stronger the magnetic field, the greater the induced electromotive force. The induced electromotive force will also increase with increased speed of cutting and with increased conductor length. When the conductor cuts the flux at right angles, the induced electromotive force is maximum. If the flux is cut in any other direction, the induced electromotive force will be less. The induced electromotive force decreases from maximum to zero as the angle of cutting decreases from 90 degrees to zero degrees. If a conductor is of such length and moves in such a direction, and at such a speed, as to cut 100,000,000 lines of force in one second, one volt (q.v.) will be induced in it. Expressed as an equation the induced electromotive force (in volts) will equal the flux cut (in lines or maxwells) divided by the product of the time (in seconds) times 100,000,000. This equation refers to the average value of the electromotive force induced in a single conductor. If a number of conductors are used the same electromotive force will be induced in each. If the conductors are so connected that their electromotive forces add up, the total average electromotive force can be found by multiplying the above equation by the number of conductors.

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