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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 811 · 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.

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  1. 1.🧮 A 12 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Resistors of 22 Ω, 20 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) bigger (d) smaller
  4. 4.🧮 A 4.5 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Resistors of 330 Ω, 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) less than either one (d) their sum
  10. 10.🧮 A 20 Ω resistor is joined in series with two equal 50 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  11. 11.🧮 A 6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 220 Ω, 10 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 470 Ω, 100 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 150 Ω, 100 Ω, 50 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 33 Ω resistor is joined in series with two equal 10 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 50 Ω, 150 Ω, 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 10 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)?
  19. 19.🧮 A 1.2 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 7 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 20 Ω, 20 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 22 Ω resistor is joined in series with two equal 50 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 47 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 33 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)?
  30. 30.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 330 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 150 Ω, 68 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 22 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 2.4 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 1.2 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 2.2 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 1
  2. 292
  3. bigger
  4. 0.25
  5. 597
  6. 20
  7. 5
  8. 20
  9. less than either one
  10. 45
  11. 1
  12. 518
  13. 110
  14. 1510
  15. 347
  16. 38
  17. 370
  18. 30
  19. 0.2
  20. 5
  21. 50
  22. 0.5
  23. 147
  24. 0.1
  25. 730
  26. 47
  27. 89
  28. 267
  29. 198
  30. 100
  31. 430
  32. 25
  33. 460
  34. 342
  35. 0.2
  36. 0.1
  37. 0.2
  38. 10
  39. 50
  40. 0.1

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