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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 129 · 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.🧮 Resistors of 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 220 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)?
  4. 4.🧮 A 1.1 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 2.4 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  8. 8.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 100 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 4 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 A 1.6 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 150 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, 20 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 330 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)?
  15. 15.🧮 Resistors of 100 Ω, 100 Ω, 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) more than either one (c) always zero (d) their sum
  17. 17.🧮 Resistors of 10 Ω, 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 22 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 2.2 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 470 Ω, 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 470 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)?
  24. 24.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 2.75 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 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)?
  29. 29.🧮 Resistors of 20 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 50 Ω, 330 Ω, 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 50 Ω, 33 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 5 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 33 Ω, 68 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 22 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)?
  37. 37.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 220 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 33 Ω resistor is joined in series with two equal 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?

Answer key

  1. 0.5
  2. 72
  3. 245
  4. 0.1
  5. 0.1
  6. 20
  7. bigger
  8. 5
  9. 201
  10. 0.5
  11. 0.2
  12. 175
  13. 141
  14. 340
  15. 690
  16. less than either one
  17. 380
  18. 10
  19. 219
  20. 67
  21. 0.2
  22. 723
  23. 635
  24. 5
  25. 5
  26. 20
  27. 0.25
  28. 143
  29. 138
  30. 1000
  31. 126
  32. 0.25
  33. 571
  34. 0.25
  35. 110
  36. 27
  37. 20
  38. 240
  39. 330
  40. 268

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