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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 218 · 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.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 100 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)?
  3. 3.🧮 Resistors of 68 Ω, 10 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 47 Ω, 150 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 33 Ω, 47 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 22 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)?
  14. 14.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 33 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  18. 18.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  23. 23.🧮 A 22 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)?
  24. 24.🧮 A 2.8 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 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)?
  26. 26.🧮 A 68 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)?
  27. 27.🧮 Resistors of 470 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 470 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)?
  29. 29.🧮 A 2.5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 22 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)?
  31. 31.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 33 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)?
  33. 33.🧮 Resistors of 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 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)?
  36. 36.🧮 Resistors of 330 Ω, 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 22 Ω, 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 1.4 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 10 Ω, 50 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 25
  2. 600
  3. 448
  4. 100
  5. 25
  6. 747
  7. 10
  8. 5
  9. 253
  10. 10
  11. 165
  12. 320
  13. 187
  14. 50
  15. 193
  16. 270
  17. bigger
  18. 0.25
  19. 20
  20. 492
  21. 370
  22. less than either one
  23. 132
  24. 0.2
  25. 568
  26. 93
  27. 590
  28. 475
  29. 0.25
  30. 72
  31. 25
  32. 133
  33. 492
  34. 235
  35. 125
  36. 370
  37. 219
  38. 172
  39. 0.1
  40. 175

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