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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 378 · 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.🧮 A 50 Ω resistor is joined in series with two equal 200 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  4. 4.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 12 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) less than either one (d) more than either one
  9. 9.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 22 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)?
  13. 13.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 20 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 10 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)?
  18. 18.🧮 A 2.2 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  22. 22.🧮 A 22 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)?
  23. 23.🧮 Resistors of 20 Ω, 470 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 2 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 150 Ω, 10 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 1.6 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.2 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 20 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 20 Ω, 20 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 1.1 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Resistors of 100 Ω, 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 50 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)?

Answer key

  1. 150
  2. 20
  3. bigger
  4. 25
  5. 1
  6. 170
  7. 25
  8. less than either one
  9. 10
  10. 0.2
  11. 235
  12. 257
  13. 20
  14. 273
  15. 40
  16. 500
  17. 175
  18. 0.2
  19. 100
  20. 100
  21. 78
  22. 132
  23. 545
  24. 0.2
  25. 50
  26. 1
  27. 50
  28. 296
  29. 0.1
  30. 110
  31. 0.1
  32. 25
  33. 0.25
  34. 43
  35. 75
  36. 100
  37. 280
  38. 0.1
  39. 250
  40. 75

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