1. Solutions to Problems of Chapter 17
Created for CVCA Physics By
Dick Heckathorn
3 March 2K + 5

2. 4-15-2K+4 19 Practice Problems page 646 #1 #2 #3 #4
15 Sample Problems page #1 #2
19 Practice Problems page 646 #1 #2 #3 #4
27 Sample Problems page 655 #1 #2 #3
34 Practice Problems page 659 #1 #2 #3 #4 #5
44 End of Chapter Problems page 673
a b c d e

3. Calculate Potential Diff. V2
SP- 1: page 645
V1 = 80 V
VT = 240 V
V2 =?
V3 = 60 V
Calculate Potential Diff. V2
= 100V

5. Calculate electric current I3
SP- 2: page 646
IT = 12.5 A
I2 = 4.0 A
I3 =?
I1 = 2.5 A
Calculate electric current I3
I3 = 6 A

7. PP- 1: page 646 Find VT in the circuit? VT= 50 V V1 = 12 V VT=?

9. Calculate electric current IT
PP- 2: page 646
Calculate electric current IT
IT =?
I2 = 1 A
I2 = 1 A
I3 = 4 A
I1 = 2 A
IT = 7 A

11. PP- 3: page 646 Find V2 Find V4 Find I3 Find I4 V4 V2= 3 V V4= 9 V
I1 = 4 A
I2 = 3 A I3
VT = 18 V V2
V3= 3 V I4 V4
Find V2
Find V4
Find I3
Find I4
V2= 3 V
V4= 9 V
I3= 1 A
I4= 4 A

13. PP- 4: page 647 Find V2 Find V5 Find V4 Find I1 Find I4 V2= 20 V
VT = 72 V I1
I3 = 4 A
I2 = 2 A V4 V2
V3= 20 V I4 V5
I5= 5A
Find V2
Find V5
Find V4
Find I1
Find I4
V2= 20 V
V5= 16 V
V4= 16 V
I1= 6 A
I4= 1 A

15. SP-1: page 655 Can find? RT = 24 Ω R1= 6 Ω I1=? V1 =? IT=? V2 =?
VT = 60 V
V2 =?
R2= 10 Ω
R3= 8 Ω
I3=?
I2=?
V3 =?
Can find? RT
= 24 Ω

16. This is the equivalent circuit Now back to the original circuit
SP-1: page 655
This is the equivalent circuit
RT= 24 Ω IT
VT = 60 V
Can find? IT
IT= 2.5 A
Now back to the original circuit

17. SP-1: page 655 R1= 6 Ω I1=2.5 A I1=? V1 = 15V V1 =? IT=2.5 A V2 =?
VT = 60 V
V2 = 25V
V2 =?
R2= 10 Ω
R3= 8 Ω
I3=2.5 A
I3=?
I2=2.5 A
I2=?
V3 = 20V
V3 =?

19. SP-2: page 656 Can find? Can find? V3 VT, V1, V2 IT R1 = 48 V
I1 = 2 A
I2 = 4 A
I3 = 6 A
IT=12A
IT=?
R1=24 Ω
R1=?
R2=12 Ω
R2=?
R3= 8 Ω
VT=48V
VT= ?
V1=48V
V1= ?
V2=48V
V2= ?
V3=48V
V3= ?
Can find?
Can find? V3
VT, V1, V2 IT R1
= 48 V
Can find? R2

21. SP-3: page 657 Can find? V2 I3 I2 V3 V1 R2 R1= 8 Ω IT = 12 A V1=96V
VT =120V
V2=24V
V2= ?
V3=24V
V3= ?
I2=4A
I2=?
I3=8A
I3=?
Can find? V2 I3 I2 V3 V1 R2

22. PP-1: page 659 Can find? V2 V1 R2 I1 = IT = 36 V = 54 V = 8 Ω = 4.5 A
I1= 4.5 A
I1= ?
V1 = ?
IT= 4.5 A
IT= ?
V1 = 54 V
VT = 90 V
R2= ?
R2= 8 Ω
I2= 4.5 A
V2 = 36 V
V2 = ?
Can find? V2 V1 R2
I1 = IT
= 36 V
= 54 V
= 8 Ω
= 4.5 A

23. PP-2: page 659 Can find? R1 VT R2 I2 = V1 = IT - I1 = 13.3 Ω = 20 Ω
IT = 15 A
I1 = 6 A
I2 = 9 A
I2 = ?
R2= 13.3 Ω
R2= ?
VT= ?
V1= 120 V
V1= ?
R1= ?
R1= 20 Ω
V2 = 120V
VT= 120 V
Can find? R1 VT R2 I2
= V1
= IT - I1
= 13.3 Ω
= 20 Ω
= 120 V
= 9 A

24. PP-3: page 659 Can find? V3 = VT – (V1 + V2) V1 = R3 = IT = I1 = I3 I2
I3= 1.5 A
I3=?
R3= 40 Ω
R3= ?
I2=1.5 A
I2=?
V3 = 60 V
V3 = ?
R2= 30 Ω
VT = 120 V
V2 = 45 V
R1= 10 Ω
IT= 1.5 A
IT= ?
I1= 1.5 A
I1= ?
V1 = 15 V
V1 = ?
Can find?
V3 = VT – (V1 + V2)
V1 =
R3 =
IT = I1 = I3 I2
= 1.5 A
15 V
40 Ω
= 1.5 A
= 60 V

25. PP-4: page 659 IT = ? I1 = ? I2 = ? R1= 60 Ω R2= 60 Ω R3= 30 Ω VT=?
I3 = 6 A

26. PP-4: page 659 IT = ? IT = 12A I1 = 3A I1 = ? I1 = 3A I2 = ? R1= 60 Ω
VT= 180V
VT=?
V1=180V
V1=?
V2=180V
V2=?
V3=180 V
V3=?
I3 = 6 A

27. PP-5: page 660 IT = ? I2 =? I1 =? R1 = 30 Ω R2= 6 Ω V1 = ? V2 = ?
VT = 120 V
V1 = ?
V2 = ?
R3=15 Ω
I3 =?
V3 = ?

28. PP-5: page 660 IT = ? R1:2 = 5 Ω R1:2= ? R3=15 Ω I3 =? V3 = ?
VT = 120 V
R3=15 Ω
I3 =?
V3 = ?

29. PP-5: page 660 IT= 6 A IT= ? I1:2+3= 6 A I1+2:3= ? R1:2+3= 20 Ω
VT = 120 V
V1:2+3 = 120 V
V1:2+3 = ?
I3 = 6 A
I3 =?

30. PP-5: page 660 IT= 6 amp I1+2 = 6 amp R1:2= 5 Ω V1:2 = ? V1:2 = 30V
VT = 120 V
V1:2 = ?
V1:2 = 30V
R3=15 Ω
I3= 6 amp
V3 = 90V
V3 = ?

31. PP-5: page 660 IT= 6 amp I1= 1 A I1=? I2= 5 A I2=? R1= 30 Ω R2= 6 Ω
VT = 120 V
V1 = 30V
V1 = ?
V2 = 30V
V2 = ?
R3=15 Ω
I3= 6 amp
V3 = 90V

32. ECP-21a: page 673 R1= 8 Ω V1 = 3.2 V V1 = ? R2= 10 Ω R2= ? VT = 12 V
I3= 0.4A
V3 = 4.8 V
V3 = ?

33. ECP 21b: page 673 IT = 6 A I1= 2 A I2= 4 A I2= ? R1= ? R1= 18 Ω
VT = 36 V
VT = ?
V1 = ?
V1 = 36 V
V2 = 36 V
V2 = ?
RT= ?
RT= 6 Ω

34. ECP 21c: page 674 R1= 60 Ω I1 = ? IT = 6 A R2= 12 Ω I2 = ? R4=11 Ω
VT = 120 V
I4 = ?
R5= 22 Ω
I5 = ?
R6= 33 Ω
I6 = ?

35. ECP 21c: page 674 R1:2= 10 Ω R1:2= Ω IT = 6 A V1 = 60 V V1 = ? R3= 4 Ω
VT = 120 V
V3= 24 V
V3 = ?
R4:5:6= 6 Ω
R4:5:6= ?
V4:5:6 = 36 V
V4:5:6 = ?

36. ECP 21c: page 674 R1= 60 Ω I1 = 1 A I1 = ? IT = 6 A V1 = 60 V R2= 12 Ω
VT = 120 V
I4 = ?
I4 = 3.3 A
R3= 4 Ω
V3= 24 V
R5= 22 Ω
I5 = ?
I5 = 1.6 A
R6= 33 Ω
I6 = ?
I6 = 1.1 A
V4:5:6 = 36 V

37. ECP 21d: page 674 R1= ? R1= 2 Ω I1 = ? I1 = 3 A IT = 4.0 A
V1:2 = 6.0 V
R2= 6 Ω
R2= ?
VT = 6.0 V
I2= 1.0A

38. ECP 21d: page 674
R1= ?
IT = 4.0 A
I1 = ?
VT = 6.0 V

39. ECP 21d: page 674
R1= ?
I1 = ?
IT = 4.0 A
R2= ?
VT = 6.0 V
I2= 1.0A

40. ECP 21e: page 674 Find R2 + R3 + R4 1.2 Ω R2= 6.0 Ω I2 = ? R3= 2.0 Ω
V2 = ?
R3= 2.0 Ω
I3 = ?
V3 = ?
I1 = ?
R4= 6.0 Ω
VT = ?
R1= 2.8 Ω
I4 = ?
V4 = ?
VT = 6.0 V
IT = ?
Find
R2 + R3 + R4
1.2 Ω

41. ECP 21e: page 674 R1+(R2:R3:R4) 4 Ω Can find? R2:R3:R4 = 1.2 Ω
VT = 6.0 V
Can find?
R1+(R2:R3:R4)
4 Ω

42. ECP 21e: page 674 Can find? IT R1, R2, R3, R4 = 4 Ω IT = ? IT = 1.5 A
VT = 6.0 V
Can find? IT

43. ECP 21e: page 674 Can find? V1 Can find? V2,3,4 R2, R3, R4 = 1.2 Ω
V2,3,4 = 1.8 V
V2,3,4 = ?
V1 = 4.2 V
V1 = ?
R1= 2.8 Ω
IT = 1.5 A
VT = 6.0 V
Can find? V1
Can find?
V2,3,4

44. ECP 21e: page 674 Can find? I2 I3 I4 R2= 6.0 Ω I2 = 0.3 A I2 = ?
V1 = 4.2 V
I4 = 0.3 A
I4 = ?
R1= 2.8 Ω
V1 = 1.8 V
I = 1.5 A
VT = 6.0 V
Can find? I2 I3 I4

45. That’s All Folks