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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 391 · 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.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  2. 2.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  3. 3.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  4. 4.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
  5. 5.🔋 How many 1.5 V cells must be joined in series to give 12 V?
  6. 6.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  7. 7.🔋 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)? =
  8. 8.🔋 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)? =
  9. 9.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 15 V (d) 230 V
  10. 10.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
  11. 11.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  12. 12.🔋 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)? =
  13. 13.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  14. 14.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  15. 15.🔋 How many 2 V cells must be joined in series to give 6 V?
  16. 16.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  17. 17.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  18. 18.🔋 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)? =
  19. 19.🔋 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)? =
  20. 20.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  21. 21.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  22. 22.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  23. 23.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
  24. 24.🔋 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)? =
  25. 25.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
  26. 26.🔋 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
  27. 27.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  28. 28.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  29. 29.🔋 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)? =
  30. 30.🔋 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)? =
  31. 31.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) no voltage (d) double the voltage
  32. 32.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  33. 33.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  34. 34.🔋 4 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 longer symbol line” means the + (positive) end. (a) False (b) True
  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.🔋 6 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.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) a bigger voltage (d) no voltage
  39. 39.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  40. 40.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =

Answer key

  1. False
  2. True
  3. True
  4. 3
  5. 8
  6. True
  7. 4.5
  8. 13.5
  9. 1.5 V
  10. 2
  11. True
  12. 15
  13. + (positive)
  14. False
  15. 3
  16. − (negative)
  17. + (positive)
  18. 6
  19. 1.2
  20. + (positive)
  21. − (negative)
  22. 7
  23. False
  24. 3
  25. True
  26. two or more cells joined
  27. 4.5
  28. 9
  29. 9
  30. 9
  31. the same voltage
  32. 4
  33. False
  34. 8
  35. True
  36. 1.5
  37. 7.2
  38. a bigger voltage
  39. 15
  40. 2.4

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