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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 34 · 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 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)?
  2. 2.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 47 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)?
  4. 4.🧮 Resistors of 100 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 68 Ω, 22 Ω, 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 3 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) zero (d) stay the same
  9. 9.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 22 Ω, 68 Ω, 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 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)?
  14. 14.🧮 A 47 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)?
  15. 15.🧮 A 220 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)?
  16. 16.🧮 Resistors of 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω, 100 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) always zero (d) their sum
  20. 20.🧮 A 14 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 A 7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 1.4 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 33 Ω, 220 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 330 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 220 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 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)?
  33. 33.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 A 0.7 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 22 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 470 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 33 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 175
  2. 235
  3. 157
  4. 342
  5. 162
  6. 0.25
  7. 110
  8. bigger
  9. 5
  10. 710
  11. 363
  12. 100
  13. 147
  14. 547
  15. 720
  16. 267
  17. 10
  18. 590
  19. less than either one
  20. 1
  21. 1
  22. 50
  23. 0.2
  24. 0.2
  25. 10
  26. 323
  27. 500
  28. 424
  29. 390
  30. 32
  31. 55
  32. 110
  33. 25
  34. 255
  35. 0.1
  36. 50
  37. 50
  38. 192
  39. 670
  40. 973

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