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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 633 · 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 330 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)?
  2. 2.🧮 Resistors of 10 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) bigger (d) zero
  5. 5.🧮 A 6 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 A 22 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 150 Ω, 470 Ω, 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 220 Ω, 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 1.1 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 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)?
  16. 16.🧮 Resistors of 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 2.2 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) always zero (d) more than either one
  22. 22.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 150 Ω, 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 20 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)?
  27. 27.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 470 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)?
  30. 30.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 3.5 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 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)?
  33. 33.🧮 A 33 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)?
  34. 34.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 0.8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 1.8 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 1.8 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 220 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)?
  40. 40.🧮 Resistors of 68 Ω, 150 Ω, 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 355
  2. 63
  3. 25
  4. bigger
  5. 0.5
  6. 1
  7. 165
  8. 1060
  9. 0.1
  10. 20
  11. 270
  12. 168
  13. 650
  14. 0.1
  15. 520
  16. 440
  17. 5
  18. 0.2
  19. 50
  20. 10
  21. less than either one
  22. 100
  23. 810
  24. 25
  25. 20
  26. 255
  27. 25
  28. 50
  29. 475
  30. 110
  31. 0.25
  32. 185
  33. 533
  34. 100
  35. 70
  36. 0.1
  37. 0.1
  38. 0.2
  39. 245
  40. 710

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