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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 798 · 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 equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  3. 3.🧮 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)?
  4. 4.🧮 Resistors of 100 Ω, 50 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 22 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) more than either one (d) always zero
  7. 7.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 100 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)?
  10. 10.🧮 Resistors of 20 Ω, 100 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 33 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)?
  13. 13.🧮 A 1.2 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Resistors of 470 Ω, 47 Ω, 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 68 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 1.2 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 47 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)?
  21. 21.🧮 A 33 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)?
  22. 22.🧮 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)?
  23. 23.🧮 A 0.7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 33 Ω, 330 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 68 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 1.8 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 4.5 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 20 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 1.75 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 16 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 47 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 50
  2. bigger
  3. 340
  4. 260
  5. 342
  6. less than either one
  7. 5
  8. 5
  9. 125
  10. 187
  11. 110
  12. 53
  13. 0.1
  14. 1009
  15. 50
  16. 10
  17. 178
  18. 0.1
  19. 20
  20. 52
  21. 533
  22. 133
  23. 0.1
  24. 913
  25. 548
  26. 500
  27. 10
  28. 0.2
  29. 0.5
  30. 20
  31. 10
  32. 64
  33. 0.25
  34. 1
  35. 288
  36. 50
  37. 165
  38. 100
  39. 169
  40. 235

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