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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 467 · 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.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 47 Ω, 100 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 68 Ω, 22 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 2.8 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) bigger (d) zero
  9. 9.🧮 Resistors of 20 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 12 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Resistors of 100 Ω, 20 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 2.8 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  14. 14.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 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)?
  16. 16.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 20 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)?
  18. 18.🧮 A 1.6 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 100 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)?
  23. 23.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 2.5 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 20 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)?
  26. 26.🧮 Resistors of 22 Ω, 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 50 Ω, 20 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 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)?
  32. 32.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 100 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  34. 34.🧮 A 0.6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 470 Ω, 20 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 150 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)?

Answer key

  1. 500
  2. 389
  3. 5
  4. 10
  5. 290
  6. 43
  7. 0.2
  8. bigger
  9. 73
  10. 0.5
  11. 497
  12. 0.2
  13. less than either one
  14. 50
  15. 550
  16. 50
  17. 30
  18. 0.2
  19. 100
  20. 20
  21. 1
  22. 600
  23. 10
  24. 0.25
  25. 40
  26. 222
  27. 125
  28. 165
  29. 110
  30. 88
  31. 120
  32. 100
  33. 150
  34. 0.1
  35. 550
  36. 662
  37. 25
  38. 20
  39. 25
  40. 160

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