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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 221 · 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) more than either one (b) their sum (c) always zero (d) less than either one
  2. 2.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  4. 4.🧮 A 1.1 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Resistors of 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 7.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 220 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)?
  12. 12.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 220 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 22 Ω, 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 50 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)?
  16. 16.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 1.75 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 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)?
  19. 19.🧮 A 68 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)?
  20. 20.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 470 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)?
  22. 22.🧮 A 2.5 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 33 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)?
  26. 26.🧮 A 100 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)?
  27. 27.🧮 Resistors of 220 Ω, 33 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 1.2 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 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)?
  31. 31.🧮 Resistors of 50 Ω, 33 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 150 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)?
  33. 33.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 22 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)?
  35. 35.🧮 Resistors of 470 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 1.5 V battery is joined to 4 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 20 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  38. 38.🧮 A 0.7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 0.8 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. less than either one
  2. 20
  3. bigger
  4. 0.1
  5. 253
  6. 0.5
  7. 110
  8. 110
  9. 0.5
  10. 10
  11. 270
  12. 100
  13. 230
  14. 190
  15. 550
  16. 100
  17. 0.25
  18. 57
  19. 88
  20. 10
  21. 480
  22. 0.25
  23. 550
  24. 5
  25. 268
  26. 120
  27. 506
  28. 0.1
  29. 235
  30. 185
  31. 143
  32. 160
  33. 5
  34. 32
  35. 502
  36. 0.25
  37. 30
  38. 0.1
  39. 0.1
  40. 20

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