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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 365 · 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.

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  1. 1.🧮 Resistors of 150 Ω, 100 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 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
  5. 5.🧮 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)?
  6. 6.🧮 A 100 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)?
  7. 7.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 220 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)?
  9. 9.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 10 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Resistors of 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 6.5 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  14. 14.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 33 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)?
  16. 16.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 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)?
  18. 18.🧮 Resistors of 47 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Four equal 80 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.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 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)?
  28. 28.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω, 22 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 50 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 20 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 1.6 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 22 Ω, 470 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 100 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)?
  38. 38.🧮 A 4 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 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)?

Answer key

  1. 468
  2. 503
  3. 25
  4. less than either one
  5. 38
  6. 110
  7. 110
  8. 330
  9. 5
  10. 1
  11. 101
  12. 0.5
  13. bigger
  14. 25
  15. 43
  16. 50
  17. 270
  18. 289
  19. 115
  20. 20
  21. 500
  22. 55
  23. 1
  24. 136
  25. 165
  26. 25
  27. 110
  28. 10
  29. 320
  30. 215
  31. 233
  32. 20
  33. 140
  34. 0.1
  35. 972
  36. 183
  37. 120
  38. 0.25
  39. 10
  40. 178

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