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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 384 · 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 resistors in parallel give a total that is … (a) less than either one (b) their sum (c) more than either one (d) always zero
  2. 2.🧮 A 2.8 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  4. 4.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 3.2 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 1.4 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 4.5 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 75 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 20 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 50 Ω, 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 16 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 330 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)?
  19. 19.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 100 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)?
  21. 21.🧮 Resistors of 22 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 10 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 50 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)?
  30. 30.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 22 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)?
  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.🧮 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)?
  36. 36.🧮 Resistors of 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 10 Ω, 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 6 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. less than either one
  2. 0.2
  3. bigger
  4. 500
  5. 0.2
  6. 5
  7. 0.2
  8. 10
  9. 165
  10. 0.5
  11. 53
  12. 25
  13. 57
  14. 5
  15. 338
  16. 10
  17. 1
  18. 430
  19. 110
  20. 125
  21. 75
  22. 100
  23. 25
  24. 175
  25. 50
  26. 235
  27. 80
  28. 1
  29. 100
  30. 5
  31. 0.25
  32. 253
  33. 47
  34. 520
  35. 132
  36. 690
  37. 20
  38. 210
  39. 20
  40. 0.5

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