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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 100 · 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.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 2.2 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  4. 4.🧮 Resistors of 68 Ω, 10 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 2 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 2.5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 2.4 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  11. 11.🧮 Resistors of 470 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 100 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)?
  13. 13.🧮 A 4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 A 2.8 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 An 8 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 470 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)?
  18. 18.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 470 Ω, 22 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 68 Ω, 10 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 68 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)?
  27. 27.🧮 A 10 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)?
  28. 28.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 150 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)?
  32. 32.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 22 Ω, 220 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 50 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 20 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 470 Ω resistors are joined in parallel. 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. 20
  2. 0.2
  3. less than either one
  4. 250
  5. 0.1
  6. 5
  7. 0.25
  8. 100
  9. 0.1
  10. bigger
  11. 512
  12. 125
  13. 1
  14. 0.2
  15. 20
  16. 0.5
  17. 475
  18. 50
  19. 100
  20. 10
  21. 5
  22. 745
  23. 458
  24. 25
  25. 500
  26. 168
  27. 175
  28. 10
  29. 100
  30. 5
  31. 260
  32. 25
  33. 336
  34. 183
  35. 10
  36. 262
  37. 20
  38. 25
  39. 235
  40. 165

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