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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 70 · 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.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) smaller (d) stay the same
  3. 3.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 0.6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 1.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 A 3.4 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 10 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)?
  8. 8.🧮 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)?
  9. 9.🧮 Resistors of 20 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 10 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)?
  15. 15.🧮 A 5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 5.5 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 47 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)?
  18. 18.🧮 Resistors of 100 Ω, 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 2.2 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) less than either one (d) always zero
  23. 23.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 15 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 1.3 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 7 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 10 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)?
  29. 29.🧮 Resistors of 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 3.25 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 Resistors of 330 Ω, 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 22 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)?
  37. 37.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 68 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)?
  40. 40.🧮 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)?

Answer key

  1. 5
  2. bigger
  3. 20
  4. 0.1
  5. 0.1
  6. 0.2
  7. 110
  8. 15
  9. 40
  10. 5
  11. 270
  12. 20
  13. 100
  14. 245
  15. 0.5
  16. 0.5
  17. 72
  18. 353
  19. 0.2
  20. 100
  21. 25
  22. less than either one
  23. 10
  24. 10
  25. 1
  26. 0.1
  27. 0.5
  28. 510
  29. 53
  30. 0.1
  31. 165
  32. 0.25
  33. 235
  34. 150
  35. 693
  36. 27
  37. 0.2
  38. 25
  39. 303
  40. 20

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