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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 842 · 40 questions
TalentJR

Remember (Add in a row, share side by side): Series: R total = R1 + R2 + R3 … Parallel, equal resistors: R total = R ÷ number of resistors (two equal → half). Then I = V ÷ R total. Example: 6 V across 4 Ω + 8 Ω = 12 Ω → 0.5 A.

NameDateTime takenScore ___ / 40
  1. 1.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  2. 2.🧮 A 20 Ω resistor is joined in series with two equal 200 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  3. 3.🧮 A 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 100 Ω resistor is joined in series with two equal 200 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  6. 6.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) their sum (c) always zero (d) more than either one
  7. 7.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 20 Ω resistor is joined in series with two equal 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  15. 15.🧮 A 1.6 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 47 Ω, 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 47 Ω, 330 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 33 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 330 Ω resistor is joined in series with two equal 20 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  24. 24.🧮 A 47 Ω resistor is joined in series with two equal 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 33 Ω resistor is joined in series with two equal 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  27. 27.🧮 A 50 Ω resistor is joined in series with two equal 1000 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 3.75 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 1.4 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 22 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 470 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 22 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 470 Ω, 150 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 10 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. bigger
  2. 120
  3. 0.5
  4. 10
  5. 200
  6. less than either one
  7. 25
  8. 1
  9. 50
  10. 20
  11. 10
  12. 165
  13. 25
  14. 255
  15. 0.1
  16. 10
  17. 5
  18. 10
  19. 25
  20. 847
  21. 560
  22. 102
  23. 340
  24. 212
  25. 115
  26. 53
  27. 550
  28. 50
  29. 0.25
  30. 0.2
  31. 712
  32. 580
  33. 235
  34. 142
  35. 50
  36. 0.25
  37. 689
  38. 80
  39. 110
  40. 1

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