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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 416 · 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.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  2. 2.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 330 Ω, 50 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 220 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)?
  5. 5.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 3.5 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 20 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)?
  9. 9.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 20 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 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
  14. 14.🧮 A 100 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)?
  15. 15.🧮 Resistors of 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 4 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 330 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 68 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)?
  20. 20.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 330 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)?
  25. 25.🧮 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)?
  26. 26.🧮 A 3.6 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 33 Ω, 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 150 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)?
  31. 31.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 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)?
  34. 34.🧮 A 22 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 1.8 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 4.5 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Resistors of 22 Ω, 68 Ω, 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 10
  3. 598
  4. 270
  5. 10
  6. 0.25
  7. 165
  8. 30
  9. 50
  10. 25
  11. 570
  12. 5
  13. less than either one
  14. 120
  15. 53
  16. 0.25
  17. 50
  18. 427
  19. 303
  20. 100
  21. 235
  22. 200
  23. 20
  24. 380
  25. 150
  26. 0.2
  27. 233
  28. 100
  29. 20
  30. 260
  31. 5
  32. 10
  33. 120
  34. 1
  35. 0.1
  36. 10
  37. 0.25
  38. 0.5
  39. 360
  40. 20

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