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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 145 · 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.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) a bigger voltage (d) the same voltage
  2. 2.🔋 8 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)? =
  3. 3.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 0.5 V (c) 15 V (d) 230 V
  4. 4.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  5. 5.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  6. 6.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  7. 7.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  8. 8.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  9. 9.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  10. 10.🔋 How many 3 V cells must be joined in series to give 12 V?
  11. 11.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
  12. 12.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  13. 13.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  14. 14.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  15. 15.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  16. 16.🔋 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)? =
  17. 17.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  18. 18.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  19. 19.🔋 How many 1.5 V cells must be joined in series to give 4.5 V?
  20. 20.🔋 What is a battery? (a) two or more cells joined (b) a kind of bulb (c) one single wire (d) a switch with a lid
  21. 21.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  22. 22.🔋 How many 2 V cells must be joined in series to give 4 V?
  23. 23.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  24. 24.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  25. 25.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  26. 26.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  27. 27.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  29. 29.🔋 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)? =
  30. 30.🔋 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)? =
  31. 31.🔋 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)? =
  32. 32.🔋 What should you do with used-up cells? (a) bury them in soil (b) give them for recycling (c) cut them open (d) throw them in a fire
  33. 33.🔋 5 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)? =
  34. 34.🔋 8 identical 2 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, “the flat end” means the + (positive) end. (a) False (b) True
  36. 36.🔋 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)? =
  37. 37.🔋 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)? =
  38. 38.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  39. 39.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  40. 40.🔋 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)? =

Answer key

  1. a bigger voltage
  2. 9
  3. 1.5 V
  4. 6
  5. 24
  6. True
  7. False
  8. True
  9. True
  10. 4
  11. False
  12. 4.5
  13. 9.6
  14. False
  15. + (positive)
  16. 6
  17. + (positive)
  18. True
  19. 3
  20. two or more cells joined
  21. + (positive)
  22. 2
  23. False
  24. True
  25. − (negative)
  26. 3.6
  27. − (negative)
  28. − (negative)
  29. 4.5
  30. 7.5
  31. 1.2
  32. give them for recycling
  33. 1.5
  34. 16
  35. False
  36. 1.2
  37. 2
  38. 7
  39. 7.5
  40. 3

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