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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 129 · 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.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  2. 2.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
  3. 3.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  4. 4.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  5. 5.🔋 How many 1.5 V cells must be joined in series to give 3 V?
  6. 6.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  7. 7.🔋 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)? =
  8. 8.🔋 How many 2 V cells must be joined in series to give 8 V?
  9. 9.🔋 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)? =
  10. 10.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  11. 11.🔋 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)? =
  12. 12.🔋 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)? =
  13. 13.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  14. 14.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  15. 15.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  16. 16.🔋 How many 3 V cells must be joined in series to give 6 V?
  17. 17.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 15 V (d) 230 V
  18. 18.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
  19. 19.🔋 How many 1.5 V cells must be joined in series to give 12 V?
  20. 20.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  21. 21.🔋 What should you do with used-up cells? (a) cut them open (b) bury them in soil (c) throw them in a fire (d) give them for recycling
  22. 22.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  23. 23.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  24. 24.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  25. 25.🔋 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)? =
  26. 26.🔋 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)? =
  27. 27.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  28. 28.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  29. 29.🔋 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
  30. 30.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) no voltage (d) the same voltage
  31. 31.🔋 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)? =
  32. 32.🔋 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)? =
  33. 33.🔋 5 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.🔋 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)? =
  35. 35.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
  36. 36.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  37. 37.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
  38. 38.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  39. 39.🔋 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)? =
  40. 40.🔋 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)? =

Answer key

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

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