A circuit operating at a p.f. 0·8 lagging takes a current of 10 A from 230 V, 50 Hz supply. (i) Find the expression for the instantaneous values for voltage and current. (ii) Calculate the value of current 5 ms after the voltage has reached its positive maximum value.
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All geologic time before the beginning of the Paleozoic era is known as Precambrian era. This includes about 90% of all geologic time and spans the time from the beginning of the earth, about 4.5 billion years ago, to 544 million years ago.
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