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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 262 · 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.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 100 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) less than either one (d) more than either one
  6. 6.🧮 A 4 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 1.2 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 100 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 33 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 47 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) smaller (c) stay the same (d) zero
  17. 17.🧮 A 10 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.🧮 A 1.4 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 47 Ω, 22 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 13 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 10 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)?
  23. 23.🧮 A 5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 47 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)?
  25. 25.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 22 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)?
  28. 28.🧮 Resistors of 330 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 33 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 7 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 100 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)?
  34. 34.🧮 A 470 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)?
  35. 35.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 10 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)?
  39. 39.🧮 Resistors of 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 10
  2. 100
  3. 166
  4. 235
  5. less than either one
  6. 0.25
  7. 500
  8. 32
  9. 240
  10. 50
  11. 0.1
  12. 272
  13. 583
  14. 244
  15. 492
  16. bigger
  17. 20
  18. 0.1
  19. 10
  20. 101
  21. 1
  22. 110
  23. 0.5
  24. 52
  25. 25
  26. 50
  27. 32
  28. 680
  29. 180
  30. 490
  31. 110
  32. 0.5
  33. 265
  34. 570
  35. 5
  36. 580
  37. 165
  38. 175
  39. 503
  40. 5

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