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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 167 · 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 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)?
  2. 2.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 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)?
  4. 4.🧮 Resistors of 20 Ω, 68 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 100 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 2 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Resistors of 20 Ω, 470 Ω, 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 220 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)?
  12. 12.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 50 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)?
  14. 14.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) less than either one (d) their sum
  16. 16.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) zero (d) stay the same
  17. 17.🧮 Resistors of 100 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 100 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)?
  19. 19.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 150 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 10 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)?
  22. 22.🧮 Resistors of 20 Ω, 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 470 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)?
  24. 24.🧮 A 13 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 220 Ω, 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 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)?
  30. 30.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 220 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 150 Ω, 33 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 47 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 480
  2. 50
  3. 475
  4. 658
  5. 5
  6. 170
  7. 570
  8. 20
  9. 0.1
  10. 533
  11. 320
  12. 25
  13. 55
  14. 500
  15. less than either one
  16. bigger
  17. 270
  18. 105
  19. 235
  20. 155
  21. 60
  22. 290
  23. 970
  24. 1
  25. 263
  26. 800
  27. 5
  28. 20
  29. 385
  30. 133
  31. 110
  32. 712
  33. 0.1
  34. 5
  35. 230
  36. 25
  37. 0.25
  38. 50
  39. 413
  40. 550

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