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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 251 · 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.🧮 A 22 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)?
  2. 2.🧮 A 1 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 150 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.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) less than either one (d) their sum
  7. 7.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  8. 8.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 470 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)?
  10. 10.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 10 Ω, 330 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 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)?
  14. 14.🧮 Resistors of 68 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 1 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 9 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 22 Ω, 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 68 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 68 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 47 Ω, 10 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.6 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 An 8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 5.5 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 220 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)?
  36. 36.🧮 A 0.7 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 68 Ω, 220 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 Resistors of 47 Ω, 20 Ω, 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 72
  2. 0.2
  3. 25
  4. 235
  5. 155
  6. less than either one
  7. bigger
  8. 10
  9. 520
  10. 50
  11. 0.25
  12. 720
  13. 110
  14. 110
  15. 100
  16. 0.1
  17. 100
  18. 80
  19. 172
  20. 0.5
  21. 517
  22. 165
  23. 0.2
  24. 20
  25. 10
  26. 222
  27. 538
  28. 169
  29. 275
  30. 50
  31. 0.2
  32. 1
  33. 0.5
  34. 5
  35. 455
  36. 0.1
  37. 332
  38. 170
  39. 160
  40. 227

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