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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 34 · 40 questions
TalentJR

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 +.

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  1. 1.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  2. 2.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
  3. 3.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  4. 4.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) double the voltage (c) half the voltage (d) the same voltage
  5. 5.🔋 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)? =
  6. 6.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  7. 7.🔋 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)? =
  8. 8.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  9. 9.🔋 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)? =
  10. 10.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  11. 11.🔋 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)? =
  12. 12.🔋 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)? =
  13. 13.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  14. 14.🔋 How many 3 V cells must be joined in series to give 9 V?
  15. 15.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
  16. 16.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  17. 17.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
  18. 18.🔋 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)? =
  19. 19.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  20. 20.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) cut them open (d) throw them in a fire
  21. 21.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) two or more cells joined (d) a kind of bulb
  22. 22.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  23. 23.🔋 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)? =
  24. 24.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  25. 25.🔋 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)? =
  26. 26.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  27. 27.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  28. 28.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  29. 29.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  30. 30.🔋 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)? =
  31. 31.🔋 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)? =
  32. 32.🔋 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)? =
  33. 33.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  34. 34.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. 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.🔋 How many 3 V cells must be joined in series to give 6 V?
  37. 37.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 230 V (d) 1.5 V
  38. 38.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  39. 39.🔋 How many 2 V cells must be joined in series to give 16 V?
  40. 40.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a bigger voltage (c) no voltage (d) a smaller voltage

Answer key

  1. + (positive)
  2. 4
  3. False
  4. the same voltage
  5. 9
  6. 7.2
  7. 1.2
  8. − (negative)
  9. 10.5
  10. False
  11. 6
  12. 1.5
  13. True
  14. 3
  15. 6
  16. True
  17. 8
  18. 7.5
  19. True
  20. give them for recycling
  21. two or more cells joined
  22. False
  23. 15
  24. − (negative)
  25. 1.2
  26. True
  27. + (positive)
  28. − (negative)
  29. + (positive)
  30. 13.5
  31. 3
  32. 1.5
  33. 6
  34. 10.5
  35. False
  36. 2
  37. 1.5 V
  38. 7.5
  39. 8
  40. a bigger voltage

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