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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 259 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  2. 2.🧮 A 100 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)?
  3. 3.🧮 A 3.6 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Resistors of 150 Ω, 68 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 330 Ω, 220 Ω, 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 20 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)?
  8. 8.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Four equal 40 Ω resistors are joined in parallel. 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.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  12. 12.🧮 Resistors of 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 68 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 100 Ω, 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 22 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)?
  17. 17.🧮 A 330 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)?
  18. 18.🧮 A 7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 2 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 68 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 20 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)?
  26. 26.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 470 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 50 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)?
  31. 31.🧮 A 0.6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 100 Ω, 50 Ω, 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 2.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 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)?
  36. 36.🧮 A 1.75 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 20 Ω, 68 Ω, 68 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 68 Ω, 330 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 210
  3. 0.2
  4. 238
  5. 67
  6. 1210
  7. 25
  8. 10
  9. 10
  10. 100
  11. less than either one
  12. 120
  13. 538
  14. 370
  15. 100
  16. 42
  17. 565
  18. 1
  19. 0.5
  20. 20
  21. 0.2
  22. 110
  23. 620
  24. 178
  25. 255
  26. 5
  27. 590
  28. 500
  29. 25
  30. 550
  31. 0.1
  32. 403
  33. 0.5
  34. 165
  35. 385
  36. 0.25
  37. 486
  38. 340
  39. 668
  40. 5

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