Electricity and magnetism for advanced students (1920)
Starling, Sydney George, 1873- · London Longmans, Green · leaf 90
Fig. 69. IV. GALVANOMETERS 79 and to the area of each turn A, and to H, the strength of tield inwhich the sides of the coil are situated. /. Couple oc jAhH. The controlling couple is proportional to the deflection $, and tothe couple c for unit twist(one radian) of the suspen-sion, the upper end… … Hence for a well-designedinstrument the current isproportional to the deflectionitself, since the field is cer-tainly of constant value until6 attains much larger valuethan that occurring in anypiobable experiment. To in-crease the sensitiveness, c maybe diminished, and A, n, andH increased, c…
Electricity · Magnetism
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