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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 479 · 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.

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  1. 1.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  2. 2.🧮 Resistors of 22 Ω, 50 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 50 Ω, 150 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 50 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)?
  6. 6.🧮 A 4.4 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 330 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)?
  11. 11.🧮 An 8 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 20 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)?
  14. 14.🧮 Resistors of 50 Ω, 330 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 470 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 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)?
  17. 17.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) more than either one (c) their sum (d) always zero
  19. 19.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 220 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 10 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 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)?
  27. 27.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 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)?
  31. 31.🧮 Resistors of 150 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 33 Ω, 20 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 150 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)?
  34. 34.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 14 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 68 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)?
  37. 37.🧮 Resistors of 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 20 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 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  40. 40.🧮 A 4 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. bigger
  2. 192
  3. 430
  4. 25
  5. 60
  6. 0.2
  7. 0.25
  8. 50
  9. 235
  10. 430
  11. 0.5
  12. 10
  13. 45
  14. 872
  15. 564
  16. 270
  17. 20
  18. less than either one
  19. 5
  20. 287
  21. 43
  22. 100
  23. 83
  24. 0.5
  25. 183
  26. 30
  27. 110
  28. 350
  29. 100
  30. 340
  31. 170
  32. 993
  33. 385
  34. 5
  35. 1
  36. 168
  37. 70
  38. 10
  39. 42
  40. 0.25

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