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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 207 · 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 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 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)?
  3. 3.🧮 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)?
  4. 4.🧮 A 1.6 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 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
  6. 6.🧮 A 3.75 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Resistors of 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 2.4 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 22 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)?
  13. 13.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 470 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)?
  15. 15.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 An 11 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 220 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 50 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)?
  20. 20.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 5 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  25. 25.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 150 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)?
  28. 28.🧮 A 22 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 68 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 33 Ω, 220 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 1.3 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 10 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 33 Ω, 220 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 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)?

Answer key

  1. 50
  2. 30
  3. 72
  4. 0.1
  5. less than either one
  6. 0.25
  7. 100
  8. 500
  9. 1
  10. 570
  11. 0.2
  12. 187
  13. 235
  14. 520
  15. 20
  16. 1
  17. 600
  18. 218
  19. 75
  20. 10
  21. 160
  22. 0.25
  23. 25
  24. bigger
  25. 0.1
  26. 5
  27. 650
  28. 1
  29. 110
  30. 5
  31. 50
  32. 538
  33. 425
  34. 0.1
  35. 5
  36. 1
  37. 371
  38. 538
  39. 25
  40. 70

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