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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 6 · 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.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  2. 2.🧮 A 10 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)?
  3. 3.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 220 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)?
  6. 6.🧮 A 2 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 33 Ω, 22 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 68 Ω, 33 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 150 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)?
  14. 14.🧮 Resistors of 50 Ω, 100 Ω, 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) more than either one (d) their sum
  17. 17.🧮 A 14 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 220 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)?
  19. 19.🧮 A 14 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 100 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 1.3 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 4.5 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 47 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 10 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)?
  25. 25.🧮 A 4.4 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 220 Ω, 150 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 47 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 220 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)?
  31. 31.🧮 Resistors of 20 Ω, 50 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 220 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)?
  33. 33.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 2.4 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 20 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 5 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 22 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)?
  38. 38.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 An 8 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 150 Ω, 20 Ω, 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 510
  3. 20
  4. 5
  5. 320
  6. 0.2
  7. 100
  8. 235
  9. 227
  10. 189
  11. 25
  12. 25
  13. 650
  14. 530
  15. 500
  16. less than either one
  17. 1
  18. 230
  19. 1
  20. 318
  21. 0.1
  22. 0.5
  23. 157
  24. 110
  25. 0.2
  26. 165
  27. 480
  28. 335
  29. 101
  30. 225
  31. 117
  32. 270
  33. 0.25
  34. 0.2
  35. 260
  36. 0.25
  37. 132
  38. 5
  39. 1
  40. 423

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