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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 38 · 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 “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  2. 2.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  3. 3.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  4. 4.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  5. 5.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) the same voltage (d) a smaller voltage
  6. 6.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  7. 7.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) the same voltage (c) half the voltage (d) no voltage
  8. 8.🔋 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)? =
  9. 9.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  10. 10.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  11. 11.🔋 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)? =
  12. 12.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  13. 13.🔋 2 identical 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) True (b) False
  15. 15.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  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.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  18. 18.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
  19. 19.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  20. 20.🔋 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)? =
  21. 21.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  22. 22.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
  23. 23.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  24. 24.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) bury them in soil (d) throw them in a fire
  25. 25.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  26. 26.🔋 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)? =
  27. 27.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
  28. 28.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  29. 29.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  30. 30.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  31. 31.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  32. 32.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  33. 33.🔋 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)? =
  34. 34.🔋 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)? =
  35. 35.🔋 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)? =
  36. 36.🔋 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)? =
  37. 37.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  38. 38.🔋 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)? =
  39. 39.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  40. 40.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True

Answer key

  1. + (positive)
  2. + (positive)
  3. + (positive)
  4. − (negative)
  5. a bigger voltage
  6. − (negative)
  7. the same voltage
  8. 1.2
  9. 14
  10. 18
  11. 10.5
  12. − (negative)
  13. 4
  14. False
  15. 7
  16. 6
  17. True
  18. 1.5 V
  19. False
  20. 3
  21. True
  22. 4
  23. 8.4
  24. give them for recycling
  25. 12
  26. 15
  27. False
  28. True
  29. True
  30. 9
  31. 8
  32. 12
  33. 9
  34. 13.5
  35. 10.5
  36. 1.5
  37. 3.6
  38. 2
  39. 24
  40. False

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