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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 427 · 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.🧮 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)?
  2. 2.🧮 Resistors of 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 10 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  5. 5.🧮 Resistors of 10 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  9. 9.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 10 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)?
  12. 12.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 68 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)?
  14. 14.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 47 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.🧮 Resistors of 50 Ω, 10 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 3 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 10 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)?
  20. 20.🧮 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)?
  21. 21.🧮 An 18 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 220 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)?
  23. 23.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 10 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 150 Ω, 33 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 2.25 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 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)?
  28. 28.🧮 Resistors of 100 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 4.8 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 22 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 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)?
  32. 32.🧮 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)?
  33. 33.🧮 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)?
  34. 34.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 470 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)?
  37. 37.🧮 Resistors of 33 Ω, 50 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 6 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 4.5 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 160
  2. 253
  3. 0.5
  4. less than either one
  5. 207
  6. 20
  7. 5
  8. bigger
  9. 110
  10. 10
  11. 35
  12. 500
  13. 568
  14. 100
  15. 547
  16. 104
  17. 0.2
  18. 10
  19. 20
  20. 340
  21. 1
  22. 385
  23. 165
  24. 120
  25. 225
  26. 0.25
  27. 52
  28. 180
  29. 0.2
  30. 342
  31. 100
  32. 480
  33. 57
  34. 25
  35. 183
  36. 475
  37. 136
  38. 0.5
  39. 235
  40. 0.25

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