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hw 33

# hw 33 - ECE 201 Spring 2010 Homework 33 Solutions Problem...

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ECE 201 Spring 2010 Homework 33 Solutions Problem 30 (a) Y in ( ) = 1 R + 1 jωL = 0 . 05 - j 0 . 25 ω Z in ( ) = 1 Y in ( ) = j 20 ω 5 + (b) I L = I in Z in ( ) jωL = 10 × 10( i + j ) j 20 = 5 2 e jπ/ 4 i L ( t ) = 10cos(5 t - π/ 4) mA Problem 40 Let the impedances of R 1 , C and R 2 , L combinations be Z 1 and Z 2 respec- tively. Z 1 = bracketleftbigg 1 500 + j (400 × 5 × 10 6 ) bracketrightbigg 1 = 250(1 - j ) Z 2 = bracketleftBigg 1 100 + 1 j (400 × 0 . 125) bracketrightBigg 1 = 20(1 + 2 j ) 1

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Let the phasor current through the source be I . I = V 270 - j 210
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hw 33 - ECE 201 Spring 2010 Homework 33 Solutions Problem...

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