Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916)
Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 253
th of this needle issmall as compared with the diameter of the ring sothat whatever position it may assume, the needle isalways in a practically uniform field. A light pointerattached to the needle moves over a graduated scale. When the galvanometer is used it is placed in sucha position that the… … Figure 152 is from this fact that the instrument derives its name. The meaning of the tangent is explained by Figure152. The tangent of an angle is the length of the linefrom F to where a line drawn from the center of thecircle through the angle in question intersects the lineF G. Thus a current…
Electrical engineering · Electric testing
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