box and as many coils added as areneeded to produce the same result as before. Anothermethod of measuring resistance is by the use of Wheat-stones bridge (Fig. 113). Wis the wire the resistance ofwhich is to be measured, andR the resistance box whosevalues are known. Plugs areremoved from the… … 140 Elements of Physics. ment is based is that when the potentials of E and F areequal no current will flow through the galvanometer, G. Electro-motive Force. (E.M.F.). — The electromotiveforce is that which causes the electricity to flow in a circuit,and is termed voltage or electric pressure. It…
Physics
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