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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 588 · 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 47 Ω, 10 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 A 150 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)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) stay the same (d) smaller
  4. 4.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 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)?
  6. 6.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  7. 7.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 3 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 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)?
  12. 12.🧮 Resistors of 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 22 Ω, 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 2.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 2.4 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 47 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)?
  21. 21.🧮 Resistors of 22 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 2.4 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 1.4 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 3 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 4.5 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 33 Ω, 20 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 68 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)?
  29. 29.🧮 A 7.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 47 Ω, 100 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 10 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)?
  34. 34.🧮 Resistors of 20 Ω, 20 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 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)?
  36. 36.🧮 A 1.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 22 Ω, 33 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 220 Ω, 10 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 1.6 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 409
  2. 315
  3. bigger
  4. 50
  5. 57
  6. less than either one
  7. 25
  8. 0.2
  9. 5
  10. 110
  11. 15
  12. 32
  13. 112
  14. 10
  15. 380
  16. 110
  17. 0.5
  18. 100
  19. 0.1
  20. 67
  21. 54
  22. 0.2
  23. 0.1
  24. 0.2
  25. 0.5
  26. 20
  27. 141
  28. 78
  29. 0.5
  30. 227
  31. 165
  32. 10
  33. 60
  34. 282
  35. 160
  36. 0.1
  37. 285
  38. 100
  39. 318
  40. 0.2

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