Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 229
FIG. 151. — A DArson-val galvanometer withfixed magnet andmovable coil. 214 PHYSICS OF THE HOUSEHOLD … scale is brought into view. The difference between the twoscale readings serves as a measure of the current. Commercial measuring instruments. — The voltmeter, Fig.152, is used to measure the e. m. f. of a current in volts. Theammeter, Fig. 153, is used to measurethe strength of a current in…
Physics · Home Economics
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