1. Chapter Circuits
In this chapter we will cover the following topics:
-Electromotive force (emf) Ideal and real emf devices Kirchhoff’s loop rule Kirchhoff’s junction rule Multiloop circuits Resistors in series Resistors in parallel RC circuits, charging and discharging of a capacitor
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2. A cylindrical copper rod has resistance R
A cylindrical copper rod has resistance R. It is re-formed to three times its original length with no change of volume. Its new resistance is:
A. R
B. 3R
C. 9R
D. R/9
E. R/3

3. pump
High (+) reservoir
Low (-) reservoir
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4. (27 – 3)

5. V i
Ideal emf device V i
Real emf device
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6. (27 – 5)

7. R i
motion R i
motion
motion + -
motion + -
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8. (27 – 7)

9. (27 – 8)

10. i V
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11. (27 – 10)

12. (27 – 11)

13. (27 – 12)

14. (27 – 13)

15. (27 – 14)

16. + - i
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17. (27 – 16)

18. + - i q t qo O
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19. In the diagram R1 > R2 > R3
In the diagram R1 > R2 > R3. Rank the three resistors according to the current in them, least to greatest.
A. 1, 2, 3
B. 3, 2, 1
C. 1, 3, 2
D. 3, 1, 3
E. All are the same

20. A. 5 Ω B. 7 Ω C. 2 Ω D. 11 Ω E. NOT

21. I. In the diagram, the current in the 3-resistor is 4A
I. In the diagram, the current in the 3-resistor is 4A. The potential difference between points 1 and 2 is:
A. 0.75V
B. 0.8V
C. 1.25V
D. 12V
E. 20V