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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 257 · 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.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 50 Ω, 47 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 3.5 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Resistors of 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 33 Ω, 150 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  11. 11.🧮 A 22 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)?
  12. 12.🧮 Resistors of 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  14. 14.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 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)?
  16. 16.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 47 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)?
  18. 18.🧮 A 2.5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Resistors of 33 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 2.5 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 33 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 1.25 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 33 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)?
  27. 27.🧮 A 1.4 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 4 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 220 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 100 Ω, 22 Ω, 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 50 Ω, 220 Ω, 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 470 Ω, 50 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 220 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)?
  40. 40.🧮 A 6 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 5
  2. 280
  3. 10
  4. 0.25
  5. 500
  6. 50
  7. 0.5
  8. 83
  9. 236
  10. bigger
  11. 72
  12. 230
  13. less than either one
  14. 110
  15. 57
  16. 20
  17. 147
  18. 0.25
  19. 121
  20. 0.25
  21. 50
  22. 205
  23. 0.25
  24. 30
  25. 25
  26. 43
  27. 0.1
  28. 0.5
  29. 218
  30. 5
  31. 570
  32. 562
  33. 168
  34. 342
  35. 50
  36. 20
  37. 575
  38. 165
  39. 385
  40. 0.25

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