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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 586 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 22 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)?
  3. 3.🧮 A 150 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)?
  4. 4.🧮 A 5 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) stay the same (d) zero
  9. 9.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 50 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)?
  12. 12.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 2 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Resistors of 47 Ω, 47 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 470 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)?
  17. 17.🧮 A 5.5 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 150 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)?
  19. 19.🧮 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)?
  20. 20.🧮 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)?
  21. 21.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  29. 29.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 3 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 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)?
  33. 33.🧮 A 50 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)?
  34. 34.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 3 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 22 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 220 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)?
  38. 38.🧮 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)?
  39. 39.🧮 A 50 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)?
  40. 40.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 5
  2. 42
  3. 155
  4. 0.5
  5. 20
  6. 20
  7. 5
  8. bigger
  9. 240
  10. 500
  11. 55
  12. 10
  13. 110
  14. 0.2
  15. 597
  16. 480
  17. 0.25
  18. 170
  19. 143
  20. 30
  21. 50
  22. 25
  23. 10
  24. 100
  25. 230
  26. 110
  27. 0.1
  28. less than either one
  29. 0.5
  30. 0.25
  31. 1
  32. 70
  33. 285
  34. 165
  35. 0.5
  36. 399
  37. 240
  38. 475
  39. 215
  40. 20

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