 | American Institute of Electrical Engineers - Electric engineering - 1892 - 888 pages
...Equation (124) may be written (125) Maximum current = *»*™™ B- «• yImpediment. Since the effective current (the square root of the mean square of the...instantaneous values of the current') is equal to — - times 4/2 the maximum value of the current, and since the effective EMF = . — times the maximum EM F, (126)... | |
 | Arthur Vaughan Abbott - Electric conductors - 1895 - 646 pages
...the readings of the instruments indicate what is termed "the effective current, or potential," being the square root of the mean square of the instantaneous values of current or pressure. 310. Measurement of Power. — The method to be used in determining the power... | |
 | Engineering - 1896 - 854 pages
...instant, supposing the alternating emf to be simply periodic. The reading on an alternating voltmeter is the square root of the mean square of the instantaneous values of the emf When applied to a simple alternating current whose maximum value, CD, is equal to a, the reading... | |
 | American Steel & Wire Co - Electric cables - 1910 - 246 pages
...strength. That value of the current strength of a sinusoidal or alternating current which is equal to the square root of the mean square of the instantaneous values of the current during one or more cycles. The square root of the time average of the square of the current. Effective... | |
 | Nehemiah Hawkins - Electricity - 1910 - 570 pages
...constant quantity which would produce the same working effect as the varying quantity. It is equal to the square root of the mean square of the instantaneous values of the varying quantity. Virtual Velocity. — In higher mechanics, a minute hypothetical displacement, assumed... | |
 | National Electric Light Association - Overhead electric lines - 1914 - 848 pages
...Foucault currents.) EFFECTIVE ELECTROMOTIVE FORCE. The difference between the direct and the counter emf The square root of the mean square of the instantaneous values of a varying electromotive force. The value which is equivalent to a constant electromotive force. EFFECTIVE... | |
 | Ralph Lawrence (Restieaux) - Electic currents, Alternating - 1922 - 462 pages
...the necessity of a factor in the expression for power which would be different for each wave form. The square root of the mean square of the instantaneous values of an alternating current or its root-me.an-square value, usually abbreviated into rms, is known as its... | |
 | United States. National Bureau of Standards - Technology - 1915 - 916 pages
...called the effective value of the current rather than the average value, the effective value being the square root of the mean square of the instantaneous values of current. Before using this formula, therefore, it is necessary, if accurate results are to be obtained,... | |
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It is equal to the square root of the mean square of the instantaneous values of the varying quantity. 