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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 228 · 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 14 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 470 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)?
  3. 3.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) less than either one (d) always zero
  7. 7.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 47 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)?
  9. 9.🧮 Resistors of 150 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  12. 12.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 15 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 2.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 3.2 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 2.4 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 20 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 330 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)?
  24. 24.🧮 A 470 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)?
  25. 25.🧮 A 22 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)?
  26. 26.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 470 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)?
  30. 30.🧮 A 220 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)?
  31. 31.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 1 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 220 Ω, 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 50 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 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  38. 38.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 1.2 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 1
  2. 705
  3. 100
  4. 32
  5. 50
  6. less than either one
  7. 110
  8. 147
  9. 220
  10. 50
  11. bigger
  12. 1
  13. 0.2
  14. 10
  15. 25
  16. 1
  17. 0.5
  18. 0.2
  19. 0.2
  20. 200
  21. 100
  22. 397
  23. 340
  24. 970
  25. 522
  26. 25
  27. 235
  28. 5
  29. 580
  30. 330
  31. 25
  32. 10
  33. 0.2
  34. 5
  35. 380
  36. 10
  37. 303
  38. 25
  39. 0.1
  40. 620

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