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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 206 · 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 220 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)?
  2. 2.🧮 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
  3. 3.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 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)?
  5. 5.🧮 Resistors of 470 Ω, 150 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 2 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 470 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)?
  10. 10.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) zero (d) bigger
  13. 13.🧮 Resistors of 22 Ω, 22 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 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)?
  18. 18.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 An 8.5 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 2.25 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 33 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 20 Ω, 33 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 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)?
  30. 30.🧮 A 50 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)?
  31. 31.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 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)?
  34. 34.🧮 Resistors of 20 Ω, 220 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 68 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 0.6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 10 Ω, 100 Ω, 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 245
  2. less than either one
  3. 0.25
  4. 230
  5. 675
  6. 25
  7. 10
  8. 0.2
  9. 520
  10. 100
  11. 100
  12. bigger
  13. 97
  14. 100
  15. 20
  16. 240
  17. 30
  18. 50
  19. 72
  20. 0.5
  21. 0.5
  22. 43
  23. 0.25
  24. 490
  25. 235
  26. 123
  27. 136
  28. 100
  29. 385
  30. 285
  31. 5
  32. 0.1
  33. 520
  34. 318
  35. 165
  36. 67
  37. 10
  38. 318
  39. 0.1
  40. 630

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