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160 ⏐⏐⏐ SERIES CIRCUITS S<br />

E = 60 V<br />

E = 35 V<br />

30 V<br />

120 V<br />

I<br />

R T<br />

I<br />

R T<br />

R T = 30 �<br />

I<br />

I<br />

2 �<br />

15 �<br />

10 �<br />

10 � 12 �<br />

(a)<br />

50 � R1 60 �<br />

R T = 220 �<br />

(a)<br />

R2 = R1 (c)<br />

6 � 12 �<br />

25 � 10 �<br />

(c)<br />

25 � 25 �<br />

10 �<br />

R<br />

60 V<br />

FIG. 5.72<br />

Problem 2.<br />

PROBLEMS<br />

SECTION 5.2 Series Circuits<br />

1. Find the total resistance and current I for each circuit of<br />

Fig. 5.71.<br />

E<br />

2. For the circuits of Fig. 5.72, the total resistance is specified.<br />

Find the unknown resistances and the current I for<br />

each circuit.<br />

I<br />

I<br />

R T<br />

10 V<br />

R T = 60 k�<br />

E<br />

50 V<br />

100 k�<br />

200 k�<br />

12.6 k� R<br />

45 k� 0.4 k�<br />

(b)<br />

R<br />

(d)<br />

1 M�<br />

0.1 M�<br />

1.2 k�<br />

E = 120 V 4.5 k�<br />

RT I<br />

FIG. 5.71<br />

Problems 1 and 36.<br />

(b)<br />

3 k� 1.3 k�<br />

0.2 M�<br />

(d)<br />

I<br />

330 k�<br />

R T = 1.6 M�<br />

56 k�<br />

2.2 k�

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