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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 22 · 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 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 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)?
  3. 3.🧮 A 5 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  5. 5.🧮 Resistors of 10 Ω, 10 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 47 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)?
  7. 7.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) their sum (d) less than either one
  8. 8.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 10 Ω resistor is joined in series with two equal 10 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  10. 10.🧮 A 3.2 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Four equal 40 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 1000 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  13. 13.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 A 2.5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 470 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)?
  22. 22.🧮 A 33 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)?
  23. 23.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 2.8 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Four equal 200 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 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  28. 28.🧮 A 10 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)?
  29. 29.🧮 A 3.5 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 470 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)?
  31. 31.🧮 Resistors of 33 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 220 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 1.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 3 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 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)?
  39. 39.🧮 A 20 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)?
  40. 40.🧮 A 330 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)?

Answer key

  1. 165
  2. 178
  3. 0.5
  4. bigger
  5. 710
  6. 97
  7. less than either one
  8. 0.25
  9. 15
  10. 0.2
  11. 10
  12. 522
  13. 0.5
  14. 0.25
  15. 25
  16. 20
  17. 5
  18. 380
  19. 10
  20. 25
  21. 490
  22. 83
  23. 5
  24. 100
  25. 0.2
  26. 50
  27. 212
  28. 30
  29. 0.25
  30. 570
  31. 203
  32. 330
  33. 50
  34. 0.1
  35. 0.25
  36. 300
  37. 240
  38. 520
  39. 185
  40. 350

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