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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 16 · 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.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) always zero (d) more than either one
  2. 2.🧮 A 4 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Resistors of 47 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 3 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 A 20 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)?
  7. 7.🧮 Resistors of 33 Ω, 33 Ω, 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 3.25 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 1 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Resistors of 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 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)?
  13. 13.🧮 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)?
  14. 14.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 22 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)?
  18. 18.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  19. 19.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 150 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)?
  21. 21.🧮 Resistors of 330 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 20 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 150 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 220 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)?
  27. 27.🧮 A 0.9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 22 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)?
  29. 29.🧮 A 10 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 33 Ω, 10 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 2.2 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 7 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 100 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 4 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. less than either one
  2. 0.5
  3. 125
  4. 0.25
  5. 0.1
  6. 520
  7. 106
  8. 0.25
  9. 0.1
  10. 43
  11. 5
  12. 568
  13. 480
  14. 110
  15. 25
  16. 72
  17. 47
  18. bigger
  19. 10
  20. 170
  21. 399
  22. 100
  23. 100
  24. 1
  25. 219
  26. 385
  27. 0.1
  28. 27
  29. 0.5
  30. 940
  31. 10
  32. 1
  33. 383
  34. 88
  35. 0.2
  36. 20
  37. 0.5
  38. 50
  39. 133
  40. 0.25

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