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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 710 · 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 100 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)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) smaller (c) stay the same (d) zero
  3. 3.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) more than either one (c) always zero (d) their sum
  5. 5.🧮 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)?
  6. 6.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 68 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 150 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)?
  10. 10.🧮 A 1.3 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Resistors of 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 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)?
  13. 13.🧮 A 3.6 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 150 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)?
  18. 18.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 150 Ω, 22 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 220 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 20 Ω resistors are joined in parallel. 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.🧮 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)?
  27. 27.🧮 Resistors of 220 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 20 Ω, 220 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 22 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  32. 32.🧮 A 150 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 10 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 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 220 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)?
  40. 40.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 120
  2. bigger
  3. 20
  4. less than either one
  5. 133
  6. 100
  7. 186
  8. 25
  9. 650
  10. 0.1
  11. 147
  12. 35
  13. 0.2
  14. 100
  15. 480
  16. 235
  17. 170
  18. 20
  19. 25
  20. 260
  21. 10
  22. 20
  23. 300
  24. 10
  25. 1
  26. 55
  27. 330
  28. 10
  29. 312
  30. 5
  31. 132
  32. 260
  33. 520
  34. 100
  35. 5
  36. 15
  37. 57
  38. 10
  39. 230
  40. 5

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