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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 448 · 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 7 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 22 Ω, 470 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) stay the same (d) zero
  5. 5.🧮 Resistors of 100 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 330 Ω, 20 Ω, 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 22 Ω, 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 47 Ω, 150 Ω, 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 2.8 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) more than either one (d) always zero
  15. 15.🧮 Resistors of 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 33 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)?
  18. 18.🧮 A 20 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)?
  19. 19.🧮 Resistors of 330 Ω, 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 50 Ω, 10 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 150 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)?
  22. 22.🧮 Resistors of 470 Ω, 22 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 20 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 14 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 7 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 1.6 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 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)?
  33. 33.🧮 An 8 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 150 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 10 Ω resistor is joined in series with two equal 20 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.5
  2. 500
  3. 869
  4. bigger
  5. 157
  6. 10
  7. 840
  8. 25
  9. 452
  10. 257
  11. 5
  12. 20
  13. 0.2
  14. less than either one
  15. 270
  16. 110
  17. 143
  18. 70
  19. 530
  20. 313
  21. 250
  22. 572
  23. 192
  24. 1
  25. 0.1
  26. 50
  27. 50
  28. 0.5
  29. 570
  30. 0.2
  31. 0.2
  32. 475
  33. 0.5
  34. 197
  35. 380
  36. 20
  37. 235
  38. 440
  39. 165
  40. 5

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