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(ELEC102)test2_pasta.pdf
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Text Box: In the circuit, X is an unknown element. . (23)



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Text Box: Rin = oo , Ro = 0
Text Box: (a)
Text Box: (b) In the circuit, find I in Arms and find VO in Vrms .. (19)
Text Box: . (a) Draw the circuit model for a voltage amplifier.What are the ideal values of the input resistance and output r





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Text Box: A load consumes 6kW at power factor (PF) of 0.6 lagging from a 200.0o Vrms 50 Hz line. (a) Find the real power (
Text Box: Connect a C parallel to the load




Text Box: (a)
Text Box: (b)
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The circuit is at steady state for t < 0. At t = 0, the switch is opened. If X = 0.4H, find IO(0), IO() , and time constant . Plot also VO(t) versus t
for t 0 and label clearly the intercepts . (22)
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Text Box: (a) Find the voltage gain A (=Vo/Vs) and draw the Vo(t) waveform. Assume an ideal op amp. (9)


Text Box: (b)


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Text Box: In the circuit, the dependent source is a voltage controlled current source and is in A. Find i , V2 and V3 in