8 - 14.89 if v a = 60sin( t + 30 ) V, v b = 30sin( t + 60 )...

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ECTE172 Introduction to Circuits and Devices Spring 2007 Tutorial 2 ( ) shows the chapter and problem number from the textbook Boylestad, 11th Edition 1. (14.34) In Fig. 14.82, e = 30 sin(377t+20 0 ) V. (a) What is the expression for the current? (b) Find the power loss in the circuit (c) How long (in seconds) does it take the current to complete six cycles. 2. (14.35) In Fig. 14.83, e = 100 sin(314t+60 0 ) V. (a) Find the sinusoidal expression for i (b) Find the value of inductance (c) Find the average power loss in the inductor. 3. (14.36) In Fig. 14.84, i = 30x10 - 3 sin(377t-20 0 ) A.(a) Find the sinusoidal expression for e (b) Find the value of capacitance in micro farads (c) Find the average power loss in the capacitor. 4. (14.48) Express the following in phasor form: (a) 2 160sin( ω t+30 0 ) V(c) 100 sin( ω t- 90 0 ) V. 5. (14.49) Express the following phasors as sine waves if the frequency is 60Hz. (a) I =40 6 20 0 A(b) V =120 6 10 0 V. 6. (14.52) Find the sinusoidal expression for the applied voltage e for the system in Fig.
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Unformatted text preview: 14.89 if v a = 60sin( t + 30 ) V, v b = 30sin( t + 60 ) V, v c = 40sin( t + 120 ) V. 7. (14.53) Find the sinusoidal expression for the current i s for the system in Fig. 14.90 if i 1 = 6x10-3 sin(377t + 180 ) A, i 2 = 8x10-3 sin(377t - 180 ) A, i 3 = 2 i 2 . 8. (15.1) Express the impedances in Fig. 15.120 in both polar and rectangular form. 9. (15.2) Find the current i for the elements in Fig. 15.121 using complex algebra. Sketch the waveforms for v and i on the same set of axes. 10. (15.3) Find the voltage v for the elements in Fig. 15.122 using complex algebra. Sketch the waveforms for v and i on the same set of axes. 1 SP:September 13, 2007 ECTE172 Introduction to Circuits and Devices Spring 2007 14.82 14.83 14.84 14.89 14.90 2 SP:September 13, 2007 ECTE172 Introduction to Circuits and Devices Spring 2007 15.120 15.121 5.122 1 3 SP:September 13, 2007...
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8 - 14.89 if v a = 60sin( t + 30 ) V, v b = 30sin( t + 60 )...

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