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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 598 · 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.🧮 A 2.4 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Resistors of 20 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  5. 5.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) smaller (d) stay the same
  7. 7.🧮 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)?
  8. 8.🧮 Resistors of 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 47 Ω, 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 4 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 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)?
  15. 15.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 470 Ω, 10 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 100 Ω resistor is joined in series with two equal 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  19. 19.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 150 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)?
  21. 21.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 47 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 20 Ω, 10 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 1.3 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 100 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)?
  27. 27.🧮 Resistors of 100 Ω, 470 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 47 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)?
  29. 29.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω, 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 5.5 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 68 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)?
  36. 36.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 0.6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 4.4 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 4.5 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.2
  2. 570
  3. 5
  4. less than either one
  5. 25
  6. bigger
  7. 210
  8. 53
  9. 100
  10. 427
  11. 5
  12. 352
  13. 0.5
  14. 175
  15. 20
  16. 165
  17. 537
  18. 335
  19. 0.1
  20. 155
  21. 50
  22. 10
  23. 265
  24. 85
  25. 0.1
  26. 600
  27. 685
  28. 57
  29. 25
  30. 820
  31. 20
  32. 10
  33. 0.5
  34. 20
  35. 233
  36. 240
  37. 0.1
  38. 0.2
  39. 0.5
  40. 50

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