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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 186 · 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 68 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)?
  2. 2.🧮 A 0.8 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 22 Ω, 20 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 20 Ω, 470 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 22 Ω, 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 A 4 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 100 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)?
  14. 14.🧮 A 33 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)?
  15. 15.🧮 Resistors of 47 Ω, 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 68 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  19. 19.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 100 Ω, 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 47 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 330 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 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)?
  28. 28.🧮 A 2.25 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 22 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) less than either one (d) more than either one
  34. 34.🧮 A 470 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)?
  35. 35.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 33 Ω, 22 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 220 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)?
  38. 38.🧮 Resistors of 330 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 470 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)?

Answer key

  1. 73
  2. 0.2
  3. 20
  4. 25
  5. 152
  6. 88
  7. 480
  8. 1010
  9. 222
  10. 0.2
  11. 0.25
  12. 440
  13. 105
  14. 38
  15. 137
  16. 235
  17. 134
  18. bigger
  19. 5
  20. 5
  21. 50
  22. 297
  23. 20
  24. 165
  25. 20
  26. 700
  27. 15
  28. 0.25
  29. 50
  30. 123
  31. 10
  32. 100
  33. less than either one
  34. 480
  35. 5
  36. 285
  37. 270
  38. 387
  39. 340
  40. 705

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