Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 136 · 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.🔋 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)? =
2. 2.🔋 How many 3 V cells must be joined in series to give 9 V?
3. 3.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
4. 4.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
5. 5.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
6. 6.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
7. 7.🔋 What is a battery? (a) a kind of bulb (b) one single wire (c) a switch with a lid (d) two or more cells joined
8. 8.🔋 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)? =
9. 9.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
10. 10.🔋 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)? =
11. 11.🔋 What should you do with used-up cells? (a) bury them in soil (b) cut them open (c) throw them in a fire (d) give them for recycling
12. 12.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
13. 13.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
14. 14.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
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.🔋 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)? =
17. 17.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
18. 18.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
19. 19.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
20. 20.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 230 V (d) 0.5 V
21. 21.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
22. 22.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
23. 23.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) double the voltage (c) half the voltage (d) the same voltage
24. 24.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
25. 25.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
26. 26.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
27. 27.🔋 How many 2 V cells must be joined in series to give 12 V?
28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
29. 29.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
30. 30.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
31. 31.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
32. 32.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a smaller voltage (d) a bigger voltage
33. 33.🔋 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)? =
34. 34.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
35. 35.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
36. 36.🔋 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)? =
37. 37.🔋 How many 2 V cells must be joined in series to give 16 V?
38. 38.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
39. 39.🔋 3 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.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =

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