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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 80 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🧮 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
  2. 2.🧮 Resistors of 10 Ω, 47 Ω, 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) bigger (d) smaller
  4. 4.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 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)?
  6. 6.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 9 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 33 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)?
  12. 12.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 470 Ω, 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 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)?
  16. 16.🧮 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)?
  17. 17.🧮 A 4.8 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 150 Ω, 33 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 150 Ω, 220 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 4.5 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 22 Ω, 50 Ω, 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 20 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)?
  29. 29.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 3.2 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 20 Ω, 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 33 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)?
  35. 35.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 68 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)?
  38. 38.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. less than either one
  2. 257
  3. bigger
  4. 20
  5. 105
  6. 25
  7. 0.5
  8. 50
  9. 10
  10. 25
  11. 198
  12. 5
  13. 630
  14. 5
  15. 185
  16. 265
  17. 0.2
  18. 110
  19. 316
  20. 620
  21. 165
  22. 0.1
  23. 0.25
  24. 20
  25. 732
  26. 100
  27. 133
  28. 255
  29. 10
  30. 0.2
  31. 320
  32. 500
  33. 50
  34. 133
  35. 235
  36. 100
  37. 118
  38. 100
  39. 363
  40. 5

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