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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 30 · 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 100 Ω, 47 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 10 Ω, 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 33 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)?
  4. 4.🧮 Two equal 200 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) less than either one (c) their sum (d) more than either one
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  7. 7.🧮 A 47 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)?
  8. 8.🧮 A 68 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)?
  9. 9.🧮 A 3.4 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Resistors of 100 Ω, 68 Ω, 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 22 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)?
  13. 13.🧮 Resistors of 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 1.25 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 22 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)?
  17. 17.🧮 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)?
  18. 18.🧮 Resistors of 10 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 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)?
  20. 20.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 470 Ω, 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 68 Ω, 47 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 20 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)?
  26. 26.🧮 A 9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 10 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)?
  30. 30.🧮 A 1.75 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 10 Ω, 50 Ω, 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 220 Ω, 10 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 5.5 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 1.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 330 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 33 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)?
  38. 38.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 100 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 330 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)?

Answer key

  1. 200
  2. 490
  3. 198
  4. 100
  5. less than either one
  6. bigger
  7. 52
  8. 73
  9. 0.2
  10. 338
  11. 500
  12. 47
  13. 120
  14. 538
  15. 0.25
  16. 122
  17. 520
  18. 330
  19. 200
  20. 5
  21. 43
  22. 25
  23. 560
  24. 262
  25. 25
  26. 1
  27. 0.25
  28. 10
  29. 120
  30. 0.25
  31. 410
  32. 273
  33. 0.5
  34. 0.1
  35. 377
  36. 80
  37. 58
  38. 10
  39. 222
  40. 355

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