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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 253 · 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.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 A 3 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 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
  4. 4.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 1.3 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Resistors of 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 1.6 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Resistors of 150 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 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)?
  12. 12.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 330 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) smaller (d) stay the same
  16. 16.🧮 Resistors of 20 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 100 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)?
  19. 19.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 50 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)?
  21. 21.🧮 Resistors of 20 Ω, 100 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.4 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 470 Ω, 47 Ω, 33 Ω and 20 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 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 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)?
  29. 29.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 3.2 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 47 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)?
  34. 34.🧮 A 1 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 470 Ω, 50 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 43
  2. 0.2
  3. less than either one
  4. 100
  5. 133
  6. 0.1
  7. 57
  8. 50
  9. 0.2
  10. 265
  11. 160
  12. 10
  13. 20
  14. 548
  15. bigger
  16. 260
  17. 25
  18. 265
  19. 5
  20. 215
  21. 362
  22. 10
  23. 10
  24. 0.1
  25. 570
  26. 42
  27. 110
  28. 350
  29. 50
  30. 0.2
  31. 25
  32. 5
  33. 157
  34. 0.1
  35. 200
  36. 25
  37. 242
  38. 20
  39. 25
  40. 640

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