Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 125 · 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 black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
2. 2.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
3. 3.🔋 4 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)? =
4. 4.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
5. 5.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
6. 6.🔋 How many 2 V cells must be joined in series to give 10 V?
7. 7.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
8. 8.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 15 V (d) 230 V
9. 9.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
10. 10.🔋 2 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)? =
11. 11.🔋 What is a battery? (a) two or more cells joined (b) a switch with a lid (c) a kind of bulb (d) one single wire
12. 12.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
13. 13.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.🔋 How many 3 V cells must be joined in series to give 18 V?
15. 15.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
16. 16.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) bury them in soil (d) give them for recycling
17. 17.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
18. 18.🔋 How many 1.5 V cells must be joined in series to give 9 V?
19. 19.🔋 3 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.🔋 How many 3 V cells must be joined in series to give 21 V?
21. 21.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) a bigger voltage (d) the same voltage
22. 22.🔋 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)? =
23. 23.🔋 2 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)? =
24. 24.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
25. 25.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
26. 26.🔋 How many 2 V cells must be joined in series to give 12 V?
27. 27.🔋 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)? =
28. 28.🔋 5 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)? =
29. 29.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
30. 30.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) double the voltage (c) half the voltage (d) the same voltage
31. 31.🔋 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)? =
32. 32.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
33. 33.🔋 4 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)? =
34. 34.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
35. 35.🔋 How many 3 V cells must be joined in series to give 9 V?
36. 36.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
37. 37.🔋 How many 3 V cells must be joined in series to give 12 V?
38. 38.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
39. 39.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
40. 40.🔋 A 12 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =

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