The r.m.s. value of a current given by i = (i₁ cos ωt + i₂ sin ωt) is –
The average value of the alternating voltage v = (157 V) sin ωt over its first half-cycle is :
A light bulb is rated at 100W for a 220 V supply. Find (a) the resistance of the bulb; (b) the peak voltage of the source; and (c) the rms current through the bulb.
(a) The peak voltage of an ac supply is 300 V. What is the rms voltage? (b) The rms value of current in an ac circuit is 10 A. What is the peak current?
Average value of A.C voltage for positive half cycle is [If V₀ is its peak voltage]
An alternating current in a circuit is given by I = 20sin (100πt + 10.05π) A. The r.m.s value of current & its frequency respectively are
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