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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 603 · 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.

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  1. 1.🧮 Resistors of 330 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 33 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 470 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)?
  6. 6.🧮 A 3.75 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 0.6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 7.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) always zero (d) less than either one
  11. 11.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 50 Ω, 10 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 1.6 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  15. 15.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 10 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)?
  18. 18.🧮 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)?
  19. 19.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 220 Ω, 470 Ω, 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 68 Ω, 150 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 220 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 470 Ω, 220 Ω, 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 100 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 22 Ω, 50 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 4.5 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 3.5 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 12 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 100 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)?
  40. 40.🧮 Resistors of 10 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 560
  2. 103
  3. 25
  4. 115
  5. 475
  6. 0.25
  7. 0.1
  8. 50
  9. 0.5
  10. less than either one
  11. 235
  12. 257
  13. 0.1
  14. bigger
  15. 5
  16. 165
  17. 175
  18. 120
  19. 110
  20. 100
  21. 363
  22. 770
  23. 319
  24. 252
  25. 20
  26. 1490
  27. 388
  28. 10
  29. 5
  30. 244
  31. 25
  32. 20
  33. 0.5
  34. 0.2
  35. 25
  36. 100
  37. 0.25
  38. 1
  39. 150
  40. 170

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