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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 609 · 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 12 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 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)?
  3. 3.🧮 A 50 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)?
  4. 4.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 20 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)?
  6. 6.🧮 A 1 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 6 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Four equal 200 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.🧮 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
  11. 11.🧮 Resistors of 22 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 2 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Resistors of 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 An 18 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 An 8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 0.6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  18. 18.🧮 Resistors of 470 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 22 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)?
  21. 21.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 A 1.6 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 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)?
  27. 27.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 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)?
  32. 32.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 470 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)?
  34. 34.🧮 Resistors of 50 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 10 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 50 Ω, 10 Ω, 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 A 1.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 1
  2. 105
  3. 55
  4. 5
  5. 130
  6. 0.2
  7. 0.5
  8. 50
  9. 500
  10. less than either one
  11. 275
  12. 0.2
  13. 43
  14. 1
  15. 1
  16. 0.1
  17. bigger
  18. 571
  19. 5
  20. 72
  21. 5
  22. 25
  23. 235
  24. 170
  25. 0.1
  26. 47
  27. 110
  28. 100
  29. 10
  30. 25
  31. 520
  32. 100
  33. 635
  34. 110
  35. 100
  36. 98
  37. 122
  38. 440
  39. 265
  40. 0.1

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