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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 593 · 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 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 20 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 2 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 2.6 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 A 20 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)?
  7. 7.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 100 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)?
  9. 9.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 An 11 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 6.5 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 10 Ω, 47 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.6 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 10 Ω, 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 47 Ω, 68 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  20. 20.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 50 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 330 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)?
  28. 28.🧮 A 470 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)?
  29. 29.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 7 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 1.4 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 A 100 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)?
  36. 36.🧮 A 1 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 20 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)?
  38. 38.🧮 A 68 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)?
  39. 39.🧮 Resistors of 220 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 1.8 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 175
  2. 10
  3. less than either one
  4. 0.1
  5. 0.2
  6. 30
  7. 20
  8. 110
  9. 100
  10. 10
  11. 147
  12. 1
  13. 0.5
  14. 50
  15. 287
  16. 0.1
  17. 88
  18. 333
  19. bigger
  20. 235
  21. 20
  22. 100
  23. 517
  24. 5
  25. 110
  26. 160
  27. 565
  28. 490
  29. 20
  30. 0.5
  31. 50
  32. 0.1
  33. 500
  34. 130
  35. 105
  36. 0.25
  37. 25
  38. 178
  39. 342
  40. 0.1

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