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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 470 · 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.🧮 Resistors of 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 0.6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  5. 5.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  6. 6.🧮 Resistors of 150 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 6 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 47 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)?
  10. 10.🧮 A 33 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)?
  11. 11.🧮 Resistors of 50 Ω, 47 Ω and 330 Ω are joined in series. 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.🧮 A 47 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)?
  14. 14.🧮 A 6 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 1.2 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 An 18 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 1.6 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 2.4 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Resistors of 150 Ω, 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 3.6 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 47 Ω, 33 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 12 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 100 Ω, 100 Ω, 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 0.9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 A 0.6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 2.75 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 25
  2. 172
  3. 0.1
  4. bigger
  5. less than either one
  6. 251
  7. 0.25
  8. 20
  9. 157
  10. 268
  11. 427
  12. 10
  13. 67
  14. 0.5
  15. 0.1
  16. 1
  17. 0.2
  18. 0.2
  19. 513
  20. 25
  21. 0.2
  22. 110
  23. 280
  24. 377
  25. 10
  26. 50
  27. 165
  28. 1
  29. 267
  30. 720
  31. 0.1
  32. 32
  33. 10
  34. 20
  35. 5
  36. 20
  37. 0.1
  38. 5
  39. 0.25
  40. 490

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