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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 105 · 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.🧮 Resistors of 47 Ω, 47 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 68 Ω, 150 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 22 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)?
  5. 5.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 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)?
  10. 10.🧮 A 220 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)?
  11. 11.🧮 Resistors of 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 330 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)?
  14. 14.🧮 A 68 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)?
  15. 15.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 68 Ω, 330 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 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)?
  20. 20.🧮 A 330 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)?
  21. 21.🧮 Resistors of 220 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 1.8 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 10 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) less than either one (d) always zero
  25. 25.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 68 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 150 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)?
  28. 28.🧮 A 20 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)?
  29. 29.🧮 A 33 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)?
  30. 30.🧮 A 10 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 22 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)?
  33. 33.🧮 A 3.75 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 4.4 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  36. 36.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 330 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 264
  2. 100
  3. 388
  4. 122
  5. 10
  6. 5
  7. 10
  8. 0.5
  9. 30
  10. 240
  11. 90
  12. 50
  13. 430
  14. 118
  15. 50
  16. 481
  17. 5
  18. 100
  19. 120
  20. 350
  21. 450
  22. 0.1
  23. 240
  24. less than either one
  25. 50
  26. 151
  27. 170
  28. 520
  29. 83
  30. 0.5
  31. 100
  32. 42
  33. 0.25
  34. 0.2
  35. bigger
  36. 43
  37. 5
  38. 500
  39. 383
  40. 165

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