Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 30 · 40 questions

Remember (Line them up, add them up): Series (+ to −): total voltage = add the cells; n identical cells = n × one cell. Parallel (identical cells, + with +): the voltage stays the same as one cell. The bump end is +, the flat end is −; the long line in the symbol is +.

1. 1.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
2. 2.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
3. 3.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 15 V (d) 0.5 V
4. 4.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
5. 5.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
6. 6.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) one single wire (d) two or more cells joined
7. 7.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
8. 8.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
9. 9.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
10. 10.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
11. 11.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
12. 12.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
13. 13.🔋 5 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
14. 14.🔋 6 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
15. 15.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
16. 16.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
17. 17.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
18. 18.🔋 6 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
19. 19.🔋 4 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
20. 20.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
21. 21.🔋 How many 2 V cells must be joined in series to give 14 V?
22. 22.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
23. 23.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
24. 24.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
25. 25.🔋 5 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
26. 26.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
27. 27.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
28. 28.🔋 How many 3 V cells must be joined in series to give 15 V?
29. 29.🔋 3 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
30. 30.🔋 2 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
31. 31.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
32. 32.🔋 6 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
33. 33.🔋 6 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
34. 34.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
35. 35.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
36. 36.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a smaller voltage (d) a bigger voltage
37. 37.🔋 How many 3 V cells must be joined in series to give 21 V?
38. 38.🔋 3 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
39. 39.🔋 How many 1.5 V cells must be joined in series to give 9 V?
40. 40.🔋 How many 3 V cells must be joined in series to give 24 V?

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