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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 387 · 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.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  2. 2.🧮 Resistors of 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 3.75 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 3.5 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 47 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 220 Ω, 22 Ω, 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) less than either one (d) always zero
  14. 14.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 An 18 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 An 11 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 10 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω, 330 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 15 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 3 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 470 Ω, 330 Ω, 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 1.6 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 47 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)?
  28. 28.🧮 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)?
  29. 29.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 150 Ω, 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 330 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.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 470 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)?
  35. 35.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 5.5 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 47 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 1.75 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 4 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. bigger
  2. 940
  3. 0.25
  4. 100
  5. 0.25
  6. 207
  7. 25
  8. 10
  9. 622
  10. 50
  11. 100
  12. 25
  13. less than either one
  14. 25
  15. 1
  16. 1
  17. 193
  18. 450
  19. 1
  20. 165
  21. 0.25
  22. 100
  23. 1230
  24. 690
  25. 0.1
  26. 5
  27. 547
  28. 150
  29. 10
  30. 210
  31. 235
  32. 380
  33. 20
  34. 520
  35. 50
  36. 20
  37. 0.5
  38. 265
  39. 0.25
  40. 0.25

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