14 . I n a n a c c i r c u i t , e m f , E = E ο cos ω t a n d c u r r e n t , I = I ο cos ( ω t - θ ) . S h o w t h a t , p o w e r d i s s i p a t i o n i n t h e c i r c u i t = 1 2 E ο I o cos θ . Share with your friends Share 0 Pintu B. answered this Dear Student , Power dissipation in an ac circuit is , P=EI=E0I0cosωtcosωt-θ=12E0I0×2cos2θ2-1=12E0I0cosθ Regards 0 View Full Answer