Electrical Engineering ⇒ Topic : Values of Alternating Voltage and Current
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David
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Values of Alternating Voltage and Current In a d.c. system, the voltage and current are constant so that there is no problem of specifying their magnitudes. However, an alternating voltage or current varies from instant to instant. A natural question arises how to express the magnitude of an alternating voltage or current. There are four ways of expressing it, namely (i) Peak value (ii) Average value or mean value (iii) R.M.S. value or effective value (iv) Peak-to-peak value Although peak, average and peak-to-peak values may be important in some engineering applications, it is the r.m.s. or effective value which is used to express the magnitude of an alternating voltage or current. | |
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