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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 247 · 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.🧮 Resistors of 100 Ω, 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 50 Ω, 33 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) more than either one (d) their sum
  5. 5.🧮 Resistors of 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 100 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)?
  7. 7.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) bigger (d) zero
  14. 14.🧮 A 10 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 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)?
  16. 16.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 0.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 33 Ω, 47 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 33 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.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 100 Ω and 20 Ω are joined in series. 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.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 1.2 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 33 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 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)?
  31. 31.🧮 A 100 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)?
  32. 32.🧮 A 2.8 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 33 Ω, 100 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 330 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)?
  35. 35.🧮 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)?
  36. 36.🧮 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)?
  37. 37.🧮 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)?
  38. 38.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 100 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. 480
  2. 323
  3. 5
  4. less than either one
  5. 40
  6. 120
  7. 10
  8. 100
  9. 0.2
  10. 50
  11. 50
  12. 100
  13. bigger
  14. 1
  15. 47
  16. 25
  17. 0.1
  18. 112
  19. 500
  20. 10
  21. 10
  22. 50
  23. 43
  24. 25
  25. 120
  26. 5
  27. 25
  28. 0.2
  29. 286
  30. 255
  31. 125
  32. 0.2
  33. 166
  34. 335
  35. 30
  36. 550
  37. 385
  38. 20
  39. 0.25
  40. 335

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