Electric power measurement
Novotny, Donald W. Department of Electrical and Computer Engineering, University of Wisconsin, Madison, Wisconsin.
- Sinusoidal ac waves
- Nonsinusoidal periodic waves
- Low-frequency measurements
- High-frequency measurements
- Links to Primary Literature
- Additional Readings
The measurement of the time rate at which electrical energy is being transmitted or dissipated in an electrical system. The potential difference in volts between two points is equal to the energy per unit charge (in joules/coulomb) which is required to move electric charge between the points. Since the electric current measures the charge per unit time (in coulombs/second), the electric power p is given by the product of the current i and the voltage υ (in joules/second = watts), as in Eq. (1).
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