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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 536 · 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.🧮 Resistors of 22 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 470 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)?
  6. 6.🧮 Resistors of 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 68 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)?
  8. 8.🧮 A 68 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.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 1.75 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) stay the same (d) zero
  12. 12.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  13. 13.🧮 A 22 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)?
  14. 14.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 0.6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 4 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 1.3 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 22 Ω, 68 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 1.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 100 Ω, 68 Ω, 47 Ω and 47 Ω are joined in series. 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.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 2.4 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 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)?
  28. 28.🧮 A 4.5 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 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)?
  30. 30.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.6 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 Resistors of 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 1.2 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 22 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)?
  38. 38.🧮 Resistors of 100 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 20 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)?
  40. 40.🧮 A 6 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 310
  2. 50
  3. 20
  4. 10
  5. 495
  6. 800
  7. 73
  8. 78
  9. 10
  10. 0.25
  11. bigger
  12. less than either one
  13. 32
  14. 5
  15. 0.1
  16. 490
  17. 0.5
  18. 0.1
  19. 110
  20. 160
  21. 467
  22. 0.1
  23. 262
  24. 5
  25. 20
  26. 0.2
  27. 120
  28. 0.5
  29. 635
  30. 50
  31. 0.1
  32. 370
  33. 25
  34. 175
  35. 70
  36. 0.1
  37. 47
  38. 320
  39. 25
  40. 0.5

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