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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 150 · 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) smaller (b) bigger (c) stay the same (d) zero
  2. 2.🧮 Two equal 220 Ω resistors are joined in parallel. 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.🧮 A 0.8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 0.7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  7. 7.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 220 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 220 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)?
  10. 10.🧮 A 22 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)?
  11. 11.🧮 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)?
  12. 12.🧮 Resistors of 10 Ω, 22 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 2 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 A 330 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)?
  15. 15.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 33 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 330 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)?
  20. 20.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 10 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 6 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Resistors of 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 150 Ω, 470 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 68 Ω, 150 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 47 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)?
  31. 31.🧮 An 8 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 20 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 68 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)?
  35. 35.🧮 Resistors of 33 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 220 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 3.4 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 33 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 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 110
  3. 0.5
  4. 0.1
  5. 0.1
  6. less than either one
  7. 20
  8. 289
  9. 720
  10. 42
  11. 380
  12. 535
  13. 0.5
  14. 495
  15. 0.25
  16. 88
  17. 10
  18. 5
  19. 340
  20. 25
  21. 500
  22. 10
  23. 0.5
  24. 253
  25. 0.25
  26. 200
  27. 710
  28. 338
  29. 25
  30. 52
  31. 0.5
  32. 121
  33. 380
  34. 568
  35. 169
  36. 1160
  37. 136
  38. 0.2
  39. 268
  40. 175

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