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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 175 · 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 22 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 A 22 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)?
  3. 3.🧮 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)?
  4. 4.🧮 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
  5. 5.🧮 A 2.5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  7. 7.🧮 Five equal 500 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 50 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 10 Ω, 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 47 Ω, 47 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 20 Ω, 22 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 150 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.6 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 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)?
  20. 20.🧮 A 1 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 0.8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 100 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)?
  26. 26.🧮 A 22 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)?
  27. 27.🧮 A 33 Ω resistor is joined in series with two equal 10 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 22 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 47 Ω, 50 Ω, 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 1.6 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 330 Ω, 20 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 100 Ω, 10 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 3.75 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 3.25 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 9 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 68 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)?
  40. 40.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 44
  2. 42
  3. 118
  4. less than either one
  5. 0.25
  6. bigger
  7. 100
  8. 35
  9. 160
  10. 161
  11. 50
  12. 152
  13. 250
  14. 50
  15. 25
  16. 0.2
  17. 165
  18. 10
  19. 130
  20. 0.1
  21. 20
  22. 50
  23. 0.1
  24. 122
  25. 200
  26. 132
  27. 38
  28. 92
  29. 235
  30. 447
  31. 10
  32. 0.1
  33. 430
  34. 228
  35. 5
  36. 0.25
  37. 0.25
  38. 0.5
  39. 178
  40. 25

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