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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 707 · 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.🧮 A 33 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.🧮 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
  3. 3.🧮 Resistors of 150 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 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)?
  5. 5.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 33 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)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  9. 9.🧮 Resistors of 33 Ω, 330 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 10 Ω, 22 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 3 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 150 Ω, 33 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 100 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)?
  15. 15.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 2 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 3 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 2.2 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 150 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)?
  21. 21.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 68 Ω, 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 33 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)?
  26. 26.🧮 A 5.5 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 22 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.🧮 Resistors of 50 Ω, 22 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 3.4 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 10 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)?
  31. 31.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 22 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)?
  33. 33.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 10 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)?
  35. 35.🧮 Resistors of 150 Ω, 470 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 50 Ω, 68 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 150 Ω, 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 2 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 330 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)?
  40. 40.🧮 Resistors of 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 58
  2. less than either one
  3. 272
  4. 495
  5. 10
  6. 253
  7. 53
  8. bigger
  9. 416
  10. 282
  11. 0.25
  12. 5
  13. 215
  14. 210
  15. 50
  16. 100
  17. 0.25
  18. 0.25
  19. 0.2
  20. 250
  21. 20
  22. 265
  23. 165
  24. 172
  25. 198
  26. 0.5
  27. 122
  28. 155
  29. 0.2
  30. 35
  31. 10
  32. 522
  33. 25
  34. 30
  35. 662
  36. 290
  37. 640
  38. 0.2
  39. 440
  40. 147

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