. A text-book of electrical engineering;. Fig. 77 We must be careful to notice, however, that, although we speak some-times of the direction of the induced current, it is electromotive force andnot current which is induced. In Fig. 74, for example, electromotive forcewas induced in I even when its ends were not metallically connected, andthis electromotive force could be shown and measured on an must, for this reason, accustom ourselves to think of the electromotiveforce as the thing induced, its magnitude depending, as we have seen, on thefield, on the length of conductor, and
. A text-book of electrical engineering;. Fig. 77 We must be careful to notice, however, that, although we speak some-times of the direction of the induced current, it is electromotive force andnot current which is induced. In Fig. 74, for example, electromotive forcewas induced in I even when its ends were not metallically connected, andthis electromotive force could be shown and measured on an must, for this reason, accustom ourselves to think of the electromotiveforce as the thing induced, its magnitude depending, as we have seen, on thefield, on the length of conductor, and on its velocity, whereas the current isquite an arbitrary thing depending on the external resistance, that is, onthe load taken by the customers of a station. The fact that the of adynamo is not constant, but varies because of the effect of the current onthe magnetic field, need not prevent us from seeing in the electromotiveforce the cause, and in the current, the effect. In the foregoing, we have always looked upon the electrom
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