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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 572 · 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 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) less than either one (d) more than either one
  6. 6.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 3.25 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 150 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 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) smaller (d) zero
  13. 13.🧮 A 0.9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 68 Ω, 50 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 68 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)?
  17. 17.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 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)?
  20. 20.🧮 Resistors of 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 470 Ω, 20 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 3 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 3 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 68 Ω, 50 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 470 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  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 47 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)?
  29. 29.🧮 A 14 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 1.2 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 33 Ω, 47 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 220 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)?
  34. 34.🧮 A 33 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)?
  35. 35.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 0.6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 50 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)?
  38. 38.🧮 Resistors of 22 Ω, 20 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 470 Ω, 50 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 150 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 500
  2. 50
  3. 20
  4. 50
  5. less than either one
  6. 10
  7. 0.25
  8. 160
  9. 50
  10. 5
  11. 50
  12. bigger
  13. 0.1
  14. 20
  15. 406
  16. 93
  17. 100
  18. 235
  19. 490
  20. 480
  21. 0.5
  22. 720
  23. 0.25
  24. 0.2
  25. 358
  26. 973
  27. 120
  28. 97
  29. 1
  30. 0.2
  31. 69
  32. 168
  33. 225
  34. 198
  35. 165
  36. 0.1
  37. 160
  38. 122
  39. 840
  40. 250

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