An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 214
ohms across. What was thee.m.f. of the dry cell? 131. Measurement of re-sistance by voltmeter-am-meter. The commonestmethod of measuring resist-ance, wherever extremeaccuracy is not required,makes use of the commoninstruments, voltmeter andammeter. Suppose a lampis the unknown resistance tobe… … Fig. 118. — Connections for measuringresistance of a lamp by voltmeter andammeter. 186 ELECTRICITY AND MAGNETISM ^Gal. Is m n N^i % D 1 | Key h Tyh h I1 This method not only requires that the instruments be ofsuitable range and be accurately calibrated, but also thatthe voltmeter be of high…
Electricity · Magnetism
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