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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 165 · 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) smaller (b) zero (c) bigger (d) stay the same
  2. 2.🧮 A 1.8 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Resistors of 330 Ω, 100 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 10 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)?
  5. 5.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 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)?
  8. 8.🧮 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
  9. 9.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 68 Ω, 150 Ω, 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 220 Ω, 100 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 3.5 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Resistors of 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 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)?
  16. 16.🧮 A 2 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 2.6 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 3 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 220 Ω, 20 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 2.6 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 470 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)?
  29. 29.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 50 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)?
  31. 31.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 68 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.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 6 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 330 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)?
  38. 38.🧮 A 1.2 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 3 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 50 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)?

Answer key

  1. bigger
  2. 0.2
  3. 1120
  4. 120
  5. 110
  6. 10
  7. 568
  8. less than either one
  9. 50
  10. 488
  11. 25
  12. 353
  13. 0.25
  14. 168
  15. 230
  16. 0.25
  17. 20
  18. 60
  19. 0.2
  20. 25
  21. 0.25
  22. 358
  23. 5
  24. 88
  25. 10
  26. 43
  27. 0.2
  28. 705
  29. 235
  30. 70
  31. 10
  32. 178
  33. 5
  34. 165
  35. 0.5
  36. 100
  37. 565
  38. 0.2
  39. 0.5
  40. 215

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