HW7solns

# HW7solns - E245B HW#7 solns Problem 7.12 Find the frequency...

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E245B HW #7 solns., 11/08/01 Problem 7.12 Find the frequency domain impedance, Z , for the network shown. z 5 -j10 10 -j5 Suggested Solution 5( 10 ) 5( 10 ) 10 5 10 5 10 5 4 2 14 7 15.65 26.6 5 10 11.2 23.4 jj Zj j j j −− =−+ =−+−=−= − ° ° Problem 7.22 The voltages v R (t), v L (t), and v C (t) in the circuit shown can be drawn as phasors in a phasor diagram. Show that v R (t) + v L (t) + v C (t) = v S (t). Suggested Solution 2 3 ( ) ( ) 2(4.37)cos(377 0.75 ) 8.74cos(377 0.75 ) 8.74 0.75 ( ) (10 )(4.37)(377)( sin(377 0.75 )) 16.47cos(377 90.75 ) 16.47 90.75 11 1 ( ) (4.37)sin(377 10 377 R R L L C Vt i tR t t V VV di Vt L

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HW7solns - E245B HW#7 solns Problem 7.12 Find the frequency...

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