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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 46 · 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.🧮 Resistors of 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 A 15 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 A 330 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)?
  4. 4.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) more than either one (d) less than either one
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  7. 7.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 3.2 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 47 Ω, 33 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 50 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)?
  12. 12.🧮 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)?
  13. 13.🧮 A 1.4 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 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)?
  17. 17.🧮 A 2.25 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 330 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)?
  19. 19.🧮 A 2.5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 3.75 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 22 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)?
  23. 23.🧮 A 2.2 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 An 18 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 7 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 100 Ω, 150 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 20 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)?
  31. 31.🧮 A 1.2 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 33 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)?
  33. 33.🧮 Resistors of 20 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 47 Ω, 20 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 68 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)?
  38. 38.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 14 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 172
  2. 1
  3. 565
  4. 10
  5. less than either one
  6. bigger
  7. 20
  8. 0.2
  9. 380
  10. 330
  11. 70
  12. 120
  13. 0.1
  14. 50
  15. 240
  16. 385
  17. 0.25
  18. 440
  19. 0.25
  20. 100
  21. 0.25
  22. 32
  23. 0.2
  24. 20
  25. 1
  26. 100
  27. 0.5
  28. 50
  29. 422
  30. 30
  31. 0.1
  32. 268
  33. 92
  34. 165
  35. 570
  36. 10
  37. 303
  38. 67
  39. 1
  40. 160

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