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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 318 · 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.🧮 Resistors of 220 Ω, 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 20 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.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) more than either one (c) always zero (d) their sum
  6. 6.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 47 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)?
  9. 9.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 220 Ω, 50 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 20 Ω, 50 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 50 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)?
  14. 14.🧮 A 330 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)?
  15. 15.🧮 Resistors of 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) bigger (d) zero
  17. 17.🧮 A 6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 68 Ω, 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 330 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)?
  26. 26.🧮 A 3.4 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 220 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 220 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)?
  30. 30.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 470 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 17 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 33 Ω, 22 Ω and 47 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.🧮 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)?
  37. 37.🧮 Resistors of 150 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 22 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.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 840
  2. 235
  3. 40
  4. 165
  5. less than either one
  6. 10
  7. 10
  8. 147
  9. 50
  10. 317
  11. 206
  12. 50
  13. 100
  14. 340
  15. 690
  16. bigger
  17. 1
  18. 20
  19. 5
  20. 10
  21. 25
  22. 265
  23. 20
  24. 110
  25. 830
  26. 0.2
  27. 264
  28. 25
  29. 245
  30. 100
  31. 5
  32. 558
  33. 1
  34. 102
  35. 25
  36. 568
  37. 192
  38. 5
  39. 187
  40. 20

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