Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 281 · 40 questions

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.

1. 1.🧮 Three equal 150 Ω resistors are joined in parallel. 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.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) their sum (d) less than either one
4. 4.🧮 A 1.6 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
5. 5.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
6. 6.🧮 A 6.5 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
7. 7.🧮 Resistors of 22 Ω, 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
8. 8.🧮 A 68 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)?
9. 9.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
10. 10.🧮 Resistors of 150 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
11. 11.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
12. 12.🧮 Resistors of 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
13. 13.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
14. 14.🧮 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)?
15. 15.🧮 A 150 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)?
16. 16.🧮 A 22 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)?
17. 17.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
18. 18.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
19. 19.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
20. 20.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
21. 21.🧮 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)?
22. 22.🧮 A 33 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)?
23. 23.🧮 A 1.6 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
24. 24.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
25. 25.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
26. 26.🧮 Resistors of 50 Ω, 22 Ω, 330 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
27. 27.🧮 A 3 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
28. 28.🧮 Resistors of 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
29. 29.🧮 A 22 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)?
30. 30.🧮 Resistors of 68 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
31. 31.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
32. 32.🧮 A 470 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)?
33. 33.🧮 A 50 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)?
34. 34.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
35. 35.🧮 A 68 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)?
36. 36.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
37. 37.🧮 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)?
38. 38.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
39. 39.🧮 Resistors of 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
40. 40.🧮 A 470 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)?

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