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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 176 · 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 2.75 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) bigger (d) zero
  3. 3.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) more than either one (d) their sum
  4. 4.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 68 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)?
  6. 6.🧮 A 2 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 2.6 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 150 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 4 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 150 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.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 100 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 50 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 220 Ω, 330 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 22 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)?
  29. 29.🧮 A 10 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 22 Ω, 330 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 12 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 2.6 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 12 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 3.5 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 10 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 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)?
  39. 39.🧮 A 1.4 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 330 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 0.25
  2. bigger
  3. less than either one
  4. 50
  5. 233
  6. 0.2
  7. 50
  8. 5
  9. 500
  10. 42
  11. 0.2
  12. 170
  13. 235
  14. 100
  15. 20
  16. 165
  17. 0.25
  18. 800
  19. 100
  20. 110
  21. 200
  22. 5
  23. 10
  24. 570
  25. 170
  26. 370
  27. 927
  28. 522
  29. 1
  30. 0.2
  31. 407
  32. 1
  33. 0.2
  34. 10
  35. 1
  36. 0.25
  37. 1
  38. 60
  39. 0.1
  40. 502

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