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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 628 · 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 2.5 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Resistors of 220 Ω and 20 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.🧮 Resistors of 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 22 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 150 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)?
  7. 7.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 20 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)?
  10. 10.🧮 Resistors of 47 Ω, 10 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 68 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.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 1.6 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Resistors of 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  20. 20.🧮 Resistors of 220 Ω, 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 2.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 22 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)?
  23. 23.🧮 A 14 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 20 Ω, 50 Ω, 33 Ω and 330 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.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) stay the same (d) smaller
  27. 27.🧮 A 2.2 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 220 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)?
  29. 29.🧮 A 0.8 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 100 Ω, 220 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 20 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 0.25
  2. 240
  3. 10
  4. 32
  5. 362
  6. 175
  7. 10
  8. 25
  9. 130
  10. 167
  11. 118
  12. 5
  13. 0.2
  14. 800
  15. 57
  16. 0.1
  17. 500
  18. 57
  19. less than either one
  20. 370
  21. 0.5
  22. 522
  23. 1
  24. 433
  25. 25
  26. bigger
  27. 0.2
  28. 245
  29. 0.1
  30. 10
  31. 373
  32. 110
  33. 1
  34. 50
  35. 100
  36. 620
  37. 183
  38. 89
  39. 43
  40. 0.1

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