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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 754 · 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 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 68 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  5. 5.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 22 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)?
  7. 7.🧮 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)?
  8. 8.🧮 Resistors of 22 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 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)?
  10. 10.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) more than either one (d) less than either one
  11. 11.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 0.9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 22 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)?
  16. 16.🧮 A 20 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)?
  17. 17.🧮 A 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 1 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  22. 22.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 22 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)?
  24. 24.🧮 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)?
  25. 25.🧮 A 13 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 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)?
  28. 28.🧮 Resistors of 50 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 22 Ω, 220 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 5 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 9 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 4.4 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 0.7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 68 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 0.7 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 33 Ω, 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 235
  2. 50
  3. 585
  4. bigger
  5. 25
  6. 47
  7. 32
  8. 77
  9. 88
  10. less than either one
  11. 500
  12. 165
  13. 0.1
  14. 5
  15. 122
  16. 520
  17. 0.2
  18. 0.1
  19. 240
  20. 160
  21. 147
  22. 5
  23. 42
  24. 100
  25. 1
  26. 20
  27. 245
  28. 116
  29. 619
  30. 0.25
  31. 0.5
  32. 0.2
  33. 0.1
  34. 201
  35. 5
  36. 100
  37. 0.1
  38. 50
  39. 193
  40. 0.1

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