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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 407 · 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.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) bigger (d) zero
  2. 2.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 100 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 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
  5. 5.🧮 Resistors of 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 1.4 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 10 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)?
  10. 10.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 330 Ω, 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 330 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 6.5 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 100 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)?
  17. 17.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 7 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Resistors of 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  22. 22.🧮 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)?
  23. 23.🧮 Resistors of 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 150 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)?
  25. 25.🧮 Resistors of 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 20 Ω, 10 Ω, 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 7 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 1.6 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 10 Ω, 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 20 Ω, 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 1.2 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 0.8 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 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)?

Answer key

  1. bigger
  2. 5
  3. 260
  4. less than either one
  5. 340
  6. 5
  7. 0.1
  8. 10
  9. 245
  10. 50
  11. 50
  12. 810
  13. 502
  14. 0.5
  15. 110
  16. 110
  17. 165
  18. 0.5
  19. 30
  20. 30
  21. 265
  22. 125
  23. 363
  24. 170
  25. 170
  26. 10
  27. 297
  28. 0.5
  29. 0.2
  30. 235
  31. 380
  32. 440
  33. 253
  34. 170
  35. 0.1
  36. 5
  37. 0.1
  38. 20
  39. 570
  40. 830

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