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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 826 · 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.🧮 A 47 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)?
  2. 2.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 20 Ω, 150 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 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
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  7. 7.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 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)?
  10. 10.🧮 Resistors of 330 Ω, 50 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 330 Ω and 47 Ω are joined in series. 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.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 10 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)?
  18. 18.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 1 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 0.9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 A 2 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 220 Ω, 47 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 68 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 22 Ω, 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 220 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)?
  27. 27.🧮 Resistors of 220 Ω, 150 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 1 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 68 Ω, 100 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 3.4 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 20 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 100 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)?
  34. 34.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 330 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)?
  36. 36.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 47 Ω, 20 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 33 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)?
  39. 39.🧮 A 1.8 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 68 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)?

Answer key

  1. 147
  2. 500
  3. 412
  4. 0.5
  5. less than either one
  6. bigger
  7. 10
  8. 25
  9. 178
  10. 872
  11. 377
  12. 5
  13. 5
  14. 50
  15. 235
  16. 492
  17. 510
  18. 25
  19. 0.1
  20. 0.1
  21. 0.5
  22. 0.1
  23. 310
  24. 398
  25. 514
  26. 240
  27. 567
  28. 50
  29. 0.1
  30. 223
  31. 0.2
  32. 260
  33. 105
  34. 20
  35. 350
  36. 5
  37. 307
  38. 133
  39. 0.2
  40. 168

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