St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 58
Fig. 71. APPARATUS FOR ELECTRICAI< MEASUREMENTS. 55 … strength of oneampere. Time isan important ele-ment in consider-ing the work a cur-rent can do. 77. ElectricalHorse-powe r;The Watt is theunit of elecflricalpower. A currenthaving the strength of one ampere, and an E. M. F. ofone volt has a unit of power. 746 watts make one elec-trical horse-power.…
Electricity
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