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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 274 · 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.🧮 Resistors of 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) zero (d) stay the same
  3. 3.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) their sum (c) always zero (d) more than either one
  4. 4.🧮 Resistors of 150 Ω, 50 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 50 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)?
  6. 6.🧮 A 5.5 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 20 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)?
  8. 8.🧮 Resistors of 50 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 10 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)?
  11. 11.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 1.4 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Resistors of 100 Ω, 470 Ω, 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 22 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 330 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)?
  17. 17.🧮 A 20 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)?
  18. 18.🧮 Resistors of 150 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 An 18 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 20 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)?
  21. 21.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 1 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.75 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 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)?
  26. 26.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 47 Ω, 470 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 10 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 3.5 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 2.2 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 50 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 10 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)?
  38. 38.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 3.25 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 492
  2. bigger
  3. less than either one
  4. 257
  5. 150
  6. 0.5
  7. 45
  8. 740
  9. 20
  10. 60
  11. 5
  12. 165
  13. 0.1
  14. 738
  15. 100
  16. 830
  17. 25
  18. 238
  19. 1
  20. 120
  21. 5
  22. 0.1
  23. 100
  24. 0.25
  25. 265
  26. 100
  27. 1207
  28. 160
  29. 147
  30. 167
  31. 120
  32. 20
  33. 0.5
  34. 80
  35. 0.2
  36. 250
  37. 510
  38. 0.2
  39. 0.25
  40. 50

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