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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 410 · 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) more than either one (b) their sum (c) less than either one (d) always zero
  2. 2.🧮 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)?
  3. 3.🧮 Resistors of 33 Ω, 100 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 330 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 An 8 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 A 33 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)?
  7. 7.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  8. 8.🧮 Resistors of 20 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 2.8 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 A 150 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)?
  11. 11.🧮 Resistors of 330 Ω, 68 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 470 Ω, 100 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 150 Ω, 220 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 220 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 33 Ω, 10 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 22 Ω, 330 Ω, 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 3.25 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 4 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 7.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 50 Ω, 50 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 47 Ω, 68 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 3.6 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 220 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 330 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 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)?
  38. 38.🧮 A 6.5 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Resistors of 10 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 150 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)?

Answer key

  1. less than either one
  2. 47
  3. 403
  4. 502
  5. 1
  6. 268
  7. bigger
  8. 98
  9. 0.2
  10. 160
  11. 728
  12. 25
  13. 1140
  14. 492
  15. 50
  16. 460
  17. 613
  18. 640
  19. 0.25
  20. 363
  21. 10
  22. 100
  23. 20
  24. 235
  25. 0.5
  26. 0.5
  27. 10
  28. 72
  29. 480
  30. 145
  31. 0.2
  32. 165
  33. 712
  34. 430
  35. 172
  36. 5
  37. 568
  38. 0.5
  39. 98
  40. 385

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