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2. For a system with<br />

Ei � 120 V �0° and Ii � 6.2 A ��10.8°<br />

determine the input impedance in rectangular form. At a<br />

frequency of 60 Hz, determine the nameplate values of<br />

the parameters.<br />

3. For the multiport system of Fig. 26.60:<br />

a. Determine the magnitude of Ii1 if Ei1 � 20 mV.<br />

b. Find Zi2 using the information provided.<br />

c. Calculate the magnitude of Ei3 .<br />

4. Given the indicated voltage levels of Fig. 26.61, determine<br />

Z o.<br />

System<br />

5. For the configuration of Fig. 26.61, determine Zo if eg� 2 sin 377t and vR � 40 � 10 �3 sin 377t, with Rs � 0.91<br />

k�.<br />

6. Determine Zo for the system of Fig. 26.61 if Eg �<br />

1.8 V (p-p) and Eo � 0.6 V rms.<br />

+<br />

+<br />

E i1<br />

–<br />

E o = 3.8 V ( p–p)<br />

–<br />

Z o<br />

R s<br />

2 k�<br />

I i1<br />

Z i = 2 k�<br />

FIG. 26.61<br />

Problems 4 through 6.<br />

+<br />

–<br />

– Ei2 = 1.8 V +<br />

Z i2<br />

Multi-port<br />

system<br />

Z i3 = 4.6 k�<br />

+ –<br />

E i3<br />

E g = 4 V ( p–p)<br />

FIG. 26.60<br />

Problem 3.<br />

PROBLEMS ⏐⏐⏐ 1185<br />

I i2 = 0.4 mA<br />

+<br />

E o<br />

–<br />

I i3 = 1.5 mA<br />

R L

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