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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 190 · 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 black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  2. 2.🔋 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)? =
  3. 3.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  4. 4.🔋 8 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.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  6. 6.🔋 A 12 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  7. 7.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  8. 8.🔋 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)? =
  9. 9.🔋 2 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)? =
  10. 10.🔋 How many 3 V cells must be joined in series to give 6 V?
  11. 11.🔋 2 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.🔋 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)? =
  13. 13.🔋 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)? =
  14. 14.🔋 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)? =
  15. 15.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 230 V (d) 1.5 V
  16. 16.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
  17. 17.🔋 How many 3 V cells must be joined in series to give 12 V?
  18. 18.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  19. 19.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  20. 20.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) a kind of bulb (d) one single wire
  21. 21.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) a bigger voltage (d) no voltage
  22. 22.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  23. 23.🔋 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)? =
  24. 24.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  25. 25.🔋 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)? =
  26. 26.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  27. 27.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  28. 28.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  29. 29.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  30. 30.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  31. 31.🔋 2 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)? =
  32. 32.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  33. 33.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  34. 34.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  35. 35.🔋 How many 1.5 V cells must be joined in series to give 9 V?
  36. 36.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  37. 37.🔋 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)? =
  38. 38.🔋 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)? =
  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.🔋 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)? =

Answer key

  1. − (negative)
  2. 3
  3. 14
  4. 9.6
  5. False
  6. 16.5
  7. True
  8. 10.5
  9. 2
  10. 2
  11. 3
  12. 3
  13. 9
  14. 12
  15. 1.5 V
  16. False
  17. 4
  18. False
  19. True
  20. two or more cells joined
  21. a bigger voltage
  22. True
  23. 9
  24. + (positive)
  25. 6
  26. False
  27. 24
  28. False
  29. + (positive)
  30. 16
  31. 1.5
  32. − (negative)
  33. True
  34. − (negative)
  35. 6
  36. 6
  37. 9
  38. 15
  39. 7.5
  40. 1.5

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