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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 279 · 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 100 Ω, 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 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
  4. 4.🧮 A 20 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)?
  5. 5.🧮 A 330 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)?
  6. 6.🧮 Resistors of 10 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 2 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 3.5 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) zero (d) stay the same
  10. 10.🧮 A 5 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 20 Ω, 150 Ω, 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 3.5 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 47 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)?
  19. 19.🧮 Resistors of 20 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 50 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 7.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 220 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 150 Ω, 220 Ω, 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 3.5 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 47 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 1.6 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 1 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 33 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 50 Ω, 100 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 33 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)?
  40. 40.🧮 Resistors of 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 367
  2. 100
  3. less than either one
  4. 130
  5. 430
  6. 513
  7. 0.25
  8. 0.5
  9. bigger
  10. 0.5
  11. 5
  12. 970
  13. 20
  14. 110
  15. 165
  16. 0.25
  17. 5
  18. 157
  19. 130
  20. 268
  21. 0.5
  22. 500
  23. 10
  24. 690
  25. 250
  26. 78
  27. 25
  28. 20
  29. 637
  30. 0.5
  31. 399
  32. 0.1
  33. 0.1
  34. 90
  35. 25
  36. 20
  37. 25
  38. 320
  39. 268
  40. 100

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