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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 123 · 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 33 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)?
  2. 2.🧮 Two equal 200 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 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 0.8 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 1.4 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  9. 9.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  10. 10.🧮 Resistors of 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 4.5 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 20 Ω, 330 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 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)?
  14. 14.🧮 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)?
  15. 15.🧮 Resistors of 47 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 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)?
  17. 17.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 20 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)?
  19. 19.🧮 Resistors of 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 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)?
  24. 24.🧮 A 100 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)?
  25. 25.🧮 Resistors of 220 Ω, 20 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 68 Ω, 33 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 1.6 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 22 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)?
  29. 29.🧮 A 2.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 68 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)?
  31. 31.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 1.6 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 220 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)?
  38. 38.🧮 Resistors of 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 470 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)?
  40. 40.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 38
  2. 100
  3. 520
  4. 235
  5. 50
  6. 0.2
  7. 0.2
  8. bigger
  9. less than either one
  10. 110
  11. 0.5
  12. 416
  13. 35
  14. 568
  15. 130
  16. 480
  17. 20
  18. 120
  19. 340
  20. 50
  21. 25
  22. 0.1
  23. 20
  24. 210
  25. 341
  26. 341
  27. 0.1
  28. 187
  29. 0.5
  30. 93
  31. 5
  32. 20
  33. 5
  34. 50
  35. 0.2
  36. 0.2
  37. 330
  38. 53
  39. 635
  40. 20

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