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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 268 · 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 1.6 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 3 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 A 3.4 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Resistors of 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 100 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)?
  6. 6.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) their sum (d) less than either one
  7. 7.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  8. 8.🧮 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)?
  9. 9.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 10 Ω, 50 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 47 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 330 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)?
  15. 15.🧮 A 6.5 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 4 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 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)?
  20. 20.🧮 A 7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 470 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)?
  24. 24.🧮 A 10 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 330 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)?
  26. 26.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 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)?
  31. 31.🧮 Resistors of 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 2 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 150 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.🧮 A 5.5 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 100 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)?
  39. 39.🧮 A 13 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 1.25 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 0.2
  2. 0.2
  3. 0.2
  4. 160
  5. 105
  6. less than either one
  7. bigger
  8. 120
  9. 67
  10. 1
  11. 100
  12. 161
  13. 169
  14. 440
  15. 0.5
  16. 100
  17. 10
  18. 0.2
  19. 30
  20. 1
  21. 197
  22. 5
  23. 475
  24. 0.5
  25. 350
  26. 235
  27. 20
  28. 25
  29. 500
  30. 185
  31. 30
  32. 0.2
  33. 110
  34. 10
  35. 50
  36. 15
  37. 0.5
  38. 265
  39. 1
  40. 0.25

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