Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 144
sitively and the movable plate negatively or if thereveise is the case. The force of attraction in each case is the 123 22 ELECTRICAL MEASUREMENTS. same. The instiuiiitnt may therefore he xis«m1 equally well foralternating or direct eiiniiits. The ehctrostatie voltmeter is useful only in measuring… … Fig. U. ences. Thev are simple in construction and have the great advan-tage that they consume no energy, since no current passes throughthe instrument. Wattmeters. The power consumed in a circuit suppliedwith a direct current is equal to the product of the amperes andE. iNL F. in volts. An…
Electrical engineering
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