Questions
In the series LCR circuit as shown in figure, the heat developed in 80 seconds and amplitude of wattless current is:
detailed solution
Correct option is A
Heat =irms2⋅Rtirms=i02=25Z2 where, Z=R2+xL−xC2=42+(7−4)2=5Ω⇒ Heat =25522×4×80=4000J and Amplitude of wattless current = i0sinϕwhere; ϕ=tan−1xL−xCR=tan−17−44=37∘⇒Amplitude =i0sin37∘=255×35=3 ampereTalk to our academic expert!
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