Assignment 5 Problems with Solutions for Electrical Circuits | EE 223, Assignments of Microelectronic Circuits

Download Assignment 5 Problems with Solutions for Electrical Circuits | EE 223 and more Assignments Microelectronic Circuits in PDF only on Docsity! Problem set #5, EE 223, 2/13/2003 – 2/18/2003 Chapter 11, Problem 15. For the network of Fig. 11.32: (a) what impedance ZL should be connected between a and b so that a maximum average power will be absorbed by it? (b) What is this maximum average power? (a) (b) Chapter 11, Problem 44. A capacitive impedance, ZC = -j120 Ω, is in parallel with a load ZL . The parallel combination is supplied by a source, Vs = V rms, that generates a complex power of 1.6 + j0.5 kVA. Find the (a) complex power delivered to ZL; (b) PF of ZL; (c) PF of the source. 1600 500VA (gen)s j= +S (a) (b) 1 1833.3PF cos tan 0.6575 lag 1600L − + = =    (c) 1600 500 1676 17.35 VA PF cos17.35 0.9545 lags sj= + = ∠ ° ∴ = °=S max 480 80 6080 60 80 60 80 60 28.8 38.4 28.8 38.4 th L j jj j j j j − = = + − = + Ω∴ = − Ω Z Z 2 2 ,max 2 5(28.8 38.4) 144 192V, 144 192 2 28.8 1 144 192and P 28.8 250 W 2 4 28.8 th L L j j j = + = + + ∴ = × + = × = × V I 1600 500 4 1.25 4 1.25 400 400 3.333A rms 4 1.25 3.333 120 4 4.583A rms 400(4 4.583) 1600 1833 VA s s c L s c L L j j j j j j j j j j ∗ += = + ∴ = − = = ∴ = − = − − − ∴ = − ∴ = + = + I I I I I I I S