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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 272 · 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 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  4. 4.🧮 A 4 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 10 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)?
  9. 9.🧮 A 330 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)?
  10. 10.🧮 Resistors of 50 Ω, 470 Ω, 22 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 150 Ω, 10 Ω, 100 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 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)?
  14. 14.🧮 A 47 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.🧮 A 2.2 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 3.5 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 3.6 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 20 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 10 Ω, 20 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 50 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.🧮 A 1.1 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 1.8 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Three equal 150 Ω resistors are joined in parallel. 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.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 1 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 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)?
  29. 29.🧮 A 0.7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 20 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 50 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 470 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)?
  36. 36.🧮 Resistors of 50 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 5 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 10 Ω, 33 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 150 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.🧮 Resistors of 47 Ω, 10 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 10
  2. less than either one
  3. bigger
  4. 0.2
  5. 235
  6. 0.5
  7. 20
  8. 60
  9. 830
  10. 642
  11. 1
  12. 480
  13. 72
  14. 212
  15. 0.2
  16. 0.5
  17. 0.2
  18. 89
  19. 73
  20. 160
  21. 0.1
  22. 43
  23. 0.2
  24. 50
  25. 25
  26. 500
  27. 0.25
  28. 157
  29. 0.1
  30. 25
  31. 10
  32. 290
  33. 144
  34. 100
  35. 490
  36. 150
  37. 0.5
  38. 100
  39. 315
  40. 190

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