Question: Physics help pretty please on a problem involving an AC circuit!??!?

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Answer #1:

a) A = sqrt(R^2 + (XL - XC)^2) = sqrt(401^2 + (602 - 903)^2) = 501Ω

b) VC = I*XC = 0.96A*903 = 867V

c) Vrms = Irms*R = Imax*sqrt(2)/2*R = 0.96*sqrt(2)/2*401 = 272V

d) P = 1/2*V*I*cos(Φ) Now Vmax = Imax*Z = 0.96*501 = 481

Φ = arctan((XL - XC)/R) = arctan((602-903)/401) = -36.9o

So P = 1/2*481*0.96*cos(36.9) = 185W





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