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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 782 · 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 22 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)?
  2. 2.🧮 Resistors of 20 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 1 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 A 20 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)?
  5. 5.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 3.6 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 20 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)?
  9. 9.🧮 Resistors of 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 6.5 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  13. 13.🧮 Resistors of 100 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 20 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.🧮 Resistors of 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 33 Ω, 20 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) more than either one (d) less than either one
  20. 20.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 6 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 2.5 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 50 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)?
  24. 24.🧮 A 2 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 33 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)?
  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 100 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)?
  34. 34.🧮 A 5.5 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 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)?
  36. 36.🧮 A 330 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)?
  37. 37.🧮 A 10 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)?
  38. 38.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 2 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 1.4 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 257
  2. 114
  3. 0.1
  4. 40
  5. 100
  6. 0.2
  7. 20
  8. 185
  9. 490
  10. 0.5
  11. 25
  12. bigger
  13. 320
  14. 20
  15. 30
  16. 170
  17. 108
  18. 165
  19. less than either one
  20. 80
  21. 0.5
  22. 0.25
  23. 160
  24. 0.2
  25. 500
  26. 288
  27. 10
  28. 25
  29. 50
  30. 20
  31. 53
  32. 1
  33. 600
  34. 0.25
  35. 210
  36. 380
  37. 30
  38. 55
  39. 0.2
  40. 0.2

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