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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 486 · 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 47 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)?
  2. 2.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  3. 3.🧮 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)?
  4. 4.🧮 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)?
  5. 5.🧮 A 20 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)?
  6. 6.🧮 A 3.75 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 1.2 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  10. 10.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Resistors of 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 10 Ω, 33 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.2 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 150 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)?
  19. 19.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 68 Ω, 47 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 1.3 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 15 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 150 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 47 Ω, 330 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 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)?
  28. 28.🧮 Resistors of 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 50 Ω, 220 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 50 Ω, 33 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 An 8.5 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 4 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 0.7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 100 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)?
  40. 40.🧮 Resistors of 470 Ω, 150 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 97
  2. less than either one
  3. 120
  4. 73
  5. 45
  6. 0.25
  7. 5
  8. 0.2
  9. bigger
  10. 20
  11. 165
  12. 0.25
  13. 340
  14. 5
  15. 423
  16. 0.1
  17. 100
  18. 160
  19. 5
  20. 235
  21. 0.1
  22. 1
  23. 840
  24. 50
  25. 10
  26. 492
  27. 568
  28. 550
  29. 348
  30. 517
  31. 603
  32. 110
  33. 20
  34. 0.5
  35. 0.25
  36. 20
  37. 0.1
  38. 100
  39. 265
  40. 770

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