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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 14 · 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) + (positive) (b) − (negative)
  2. 2.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  3. 3.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) double the voltage (d) no voltage
  4. 4.🔋 2 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)? =
  5. 5.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) a bigger voltage (d) the same voltage
  6. 6.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  7. 7.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  8. 8.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  9. 9.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  10. 10.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  11. 11.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  12. 12.🔋 How many 3 V cells must be joined in series to give 12 V?
  13. 13.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  14. 14.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
  15. 15.🔋 How many 2 V cells must be joined in series to give 16 V?
  16. 16.🔋 What is a battery? (a) two or more cells joined (b) a switch with a lid (c) one single wire (d) a kind of bulb
  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, “the flat end” means the − (negative) end. (a) False (b) True
  19. 19.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  20. 20.🔋 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)? =
  21. 21.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  22. 22.🔋 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)? =
  23. 23.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
  24. 24.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  25. 25.🔋 What should you do with used-up cells? (a) throw them in a fire (b) bury them in soil (c) cut them open (d) give them for recycling
  26. 26.🔋 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)? =
  27. 27.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  28. 28.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  29. 29.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  30. 30.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
  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.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
  33. 33.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  34. 34.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  35. 35.🔋 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)? =
  36. 36.🔋 How many 1.5 V cells must be joined in series to give 12 V?
  37. 37.🔋 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)? =
  38. 38.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  39. 39.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
  40. 40.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?

Answer key

  1. + (positive)
  2. False
  3. the same voltage
  4. 1.2
  5. a bigger voltage
  6. 9
  7. + (positive)
  8. False
  9. True
  10. − (negative)
  11. 10.5
  12. 4
  13. 6
  14. 8
  15. 8
  16. two or more cells joined
  17. + (positive)
  18. True
  19. 2.4
  20. 10.5
  21. 15
  22. 15
  23. False
  24. − (negative)
  25. give them for recycling
  26. 3
  27. True
  28. True
  29. 12
  30. 1.5 V
  31. 3
  32. False
  33. 7.2
  34. True
  35. 1.2
  36. 8
  37. 1.5
  38. False
  39. False
  40. 4

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