Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 213 · 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.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) half the voltage (c) double the voltage (d) the same voltage
2. 2.🔋 How many 3 V cells must be joined in series to give 18 V?
3. 3.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 15 V (d) 1.5 V
4. 4.🔋 How many 1.5 V cells must be joined in series to give 6 V?
5. 5.🔋 5 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)? =
6. 6.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
7. 7.🔋 A 12 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
8. 8.🔋 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)? =
9. 9.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
10. 10.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
11. 11.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) two or more cells joined (d) a switch with a lid
12. 12.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
13. 13.🔋 How many 2 V cells must be joined in series to give 10 V?
14. 14.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
15. 15.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
16. 16.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
17. 17.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
18. 18.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
19. 19.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
20. 20.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
21. 21.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
22. 22.🔋 6 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
23. 23.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) no voltage (d) a bigger voltage
24. 24.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
25. 25.🔋 How many 3 V cells must be joined in series to give 24 V?
26. 26.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) throw them in a fire (d) bury them in soil
27. 27.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
28. 28.🔋 7 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)? =
29. 29.🔋 2 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)? =
30. 30.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
31. 31.🔋 How many 2 V cells must be joined in series to give 4 V?
32. 32.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
33. 33.🔋 How many 1.5 V cells must be joined in series to give 3 V?
34. 34.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
35. 35.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
36. 36.🔋 How many 2 V cells must be joined in series to give 6 V?
37. 37.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
38. 38.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
39. 39.🔋 4 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)? =
40. 40.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =

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