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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 370 · 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 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) less than either one (d) always zero
  3. 3.🧮 Resistors of 50 Ω, 150 Ω, 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 2.25 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 A 470 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)?
  7. 7.🧮 A 330 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)?
  8. 8.🧮 A 1.4 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  10. 10.🧮 Resistors of 150 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 20 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)?
  13. 13.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 100 Ω, 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 68 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)?
  16. 16.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 20 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω, 50 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 50 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.🧮 A 33 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)?
  21. 21.🧮 Resistors of 22 Ω, 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 68 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 47 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)?
  24. 24.🧮 A 20 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)?
  25. 25.🧮 A 100 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)?
  26. 26.🧮 A 4.5 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 330 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 2 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 470 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 20 Ω, 33 Ω, 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 150 Ω, 22 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.1
  2. less than either one
  3. 690
  4. 25
  5. 0.25
  6. 490
  7. 495
  8. 0.1
  9. bigger
  10. 700
  11. 490
  12. 120
  13. 10
  14. 250
  15. 88
  16. 1
  17. 138
  18. 100
  19. 150
  20. 43
  21. 102
  22. 268
  23. 57
  24. 130
  25. 600
  26. 0.5
  27. 850
  28. 100
  29. 480
  30. 5
  31. 0.1
  32. 110
  33. 20
  34. 620
  35. 96
  36. 288
  37. 133
  38. 5
  39. 402
  40. 100

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