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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 789 · 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 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)?
  2. 2.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 2.75 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 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
  5. 5.🧮 Resistors of 330 Ω, 33 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 47 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 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)?
  8. 8.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) bigger (d) smaller
  10. 10.🧮 A 47 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)?
  11. 11.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 470 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)?
  13. 13.🧮 A 6 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Resistors of 470 Ω, 20 Ω, 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 47 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)?
  17. 17.🧮 A 2.6 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 470 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)?
  19. 19.🧮 Resistors of 20 Ω, 10 Ω, 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 22 Ω, 220 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 10 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 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)?
  27. 27.🧮 A 2.6 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 330 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 47 Ω, 47 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 An 8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 47 Ω, 220 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 1.5 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 50 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)?
  39. 39.🧮 Resistors of 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 50 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. 15
  2. 133
  3. 0.25
  4. less than either one
  5. 883
  6. 147
  7. 185
  8. 100
  9. bigger
  10. 57
  11. 100
  12. 570
  13. 0.5
  14. 562
  15. 235
  16. 72
  17. 0.2
  18. 520
  19. 550
  20. 110
  21. 40
  22. 284
  23. 69
  24. 0.5
  25. 20
  26. 210
  27. 0.2
  28. 20
  29. 450
  30. 100
  31. 490
  32. 471
  33. 1
  34. 10
  35. 218
  36. 299
  37. 0.25
  38. 550
  39. 620
  40. 160

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