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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 361 · 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 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 20 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 20 Ω, 10 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 20 Ω, 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 3.2 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 3 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 330 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 10 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 1.8 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 33 Ω, 470 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 20 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)?
  16. 16.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) less than either one (d) their sum
  17. 17.🧮 A 7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  19. 19.🧮 A 68 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.🧮 Resistors of 330 Ω, 20 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 10 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)?
  22. 22.🧮 Two equal 220 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.🧮 Resistors of 330 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 10 Ω, 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 10 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)?
  32. 32.🧮 Resistors of 470 Ω, 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 3 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 150 Ω, 50 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 0.6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 33 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)?
  39. 39.🧮 A 10 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)?
  40. 40.🧮 A 10 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)?

Answer key

  1. 25
  2. 5
  3. 235
  4. 138
  5. 272
  6. 383
  7. 0.2
  8. 0.25
  9. 513
  10. 228
  11. 0.1
  12. 25
  13. 556
  14. 168
  15. 520
  16. less than either one
  17. 1
  18. bigger
  19. 178
  20. 522
  21. 35
  22. 110
  23. 10
  24. 385
  25. 50
  26. 20
  27. 500
  28. 800
  29. 10
  30. 100
  31. 510
  32. 950
  33. 0.5
  34. 255
  35. 50
  36. 25
  37. 0.1
  38. 533
  39. 245
  40. 20

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