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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 591 · 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 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 50 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 330 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 22 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 100 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)?
  7. 7.🧮 Resistors of 22 Ω, 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  9. 9.🧮 Resistors of 50 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 33 Ω, 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 330 Ω, 220 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 22 Ω, 20 Ω, 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 470 Ω, 33 Ω, 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 22 Ω, 50 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) their sum (d) less than either one
  20. 20.🧮 A 20 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)?
  21. 21.🧮 Resistors of 100 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 2.2 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 68 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 330 Ω, 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 470 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)?
  28. 28.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 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)?
  30. 30.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 470 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 7 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 68 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 15 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 An 8 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 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)?

Answer key

  1. 10
  2. 170
  3. 463
  4. 50
  5. 712
  6. 210
  7. 642
  8. bigger
  9. 570
  10. 10
  11. 235
  12. 183
  13. 803
  14. 309
  15. 563
  16. 50
  17. 20
  18. 244
  19. less than either one
  20. 130
  21. 320
  22. 0.2
  23. 25
  24. 20
  25. 286
  26. 420
  27. 570
  28. 500
  29. 38
  30. 25
  31. 0.5
  32. 990
  33. 0.5
  34. 25
  35. 138
  36. 1
  37. 67
  38. 10
  39. 0.5
  40. 120

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