UNITS OF ELECTRICAL MEASUREMENT

Electrical Science Volume 1 of 4
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Basic Electrical Theory UNITS OF ELECTRICAL MEASUREMENT UNITS OF ELECTRICAL MEASUREMENT Using Ohm’s Law and the System Internationale (SI) Metric System, electrical measuring units can be derived. EO 1.3 DESCRIBE the following electrical parameters, including the unit of measurement and the relationship to other parameters. a. Voltage b. Current c. Resistance d. Conductance e. Power f. Inductance g. Capacitance EO 1.4 Given any two of the three component values of Ohm’s Law, DETERMINE the unknown component value. System Internationale (SI) Metric System Electrical units of measurement are based on the International (metric) System, also known as the SI System. Units of electrical measurement include the following: Ampere Volt Ohm Siemens Watt Henry Farad Appendix A provides more information concerning the metric system, metric prefixes, and powers of 10 that are used in electrical measuring units. Voltage Voltage, electromotive force (emf), or potential difference, is described as the pressure or force that causes electrons to move in a conductor. In electrical formulas and equations, you will see voltage symbolized with a capital E, while on laboratory equipment or schematic diagrams, the voltage is often represented with a capital V. Rev. 0 Page 13 ES-01

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