No links please Short Questions Q14. In an ac circuit, emf, E = E0 cos ω t and current, I = I0 cos ( ω t – θ ). Show that, power dissipation in the circult = 1 2 E 0 I 0 cos θ . Share with your friends Share 0 Sandeep K. Gupta answered this Dear Student, Given - E=E0 cos ωt and I=I0 cos ωt-θBecause average power loss for one cycle is given byP=ErmsIrms cosφHere , Erms=E02 , Irms=I02 and φ=θHence , P=E02I02 cosθP=12E0 I0 cosθ Regards. 0 View Full Answer