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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 245 · 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, “usually the red wire” means the + (positive) end. (a) True (b) False
  2. 2.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  3. 3.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  4. 4.🔋 7 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)? =
  5. 5.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
  6. 6.🔋 How many 2 V cells must be joined in series to give 12 V?
  7. 7.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  8. 8.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) one single wire (d) a switch with a lid
  9. 9.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
  10. 10.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  11. 11.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  12. 12.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  13. 13.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  14. 14.🔋 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)? =
  15. 15.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  16. 16.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  17. 17.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  18. 18.🔋 6 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)? =
  19. 19.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) half the voltage (c) double the voltage (d) no voltage
  20. 20.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  21. 21.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) no voltage (d) a bigger voltage
  22. 22.🔋 How many 3 V cells must be joined in series to give 9 V?
  23. 23.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 0.5 V (c) 15 V (d) 1.5 V
  24. 24.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
  25. 25.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  26. 26.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  27. 27.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  28. 28.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  29. 29.🔋 How many 1.2 V cells must be joined in series to give 6 V?
  30. 30.🔋 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)? =
  31. 31.🔋 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)? =
  32. 32.🔋 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)? =
  33. 33.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  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 longer symbol line” means the − (negative) end. (a) False (b) True
  36. 36.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
  37. 37.🔋 2 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)? =
  38. 38.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  39. 39.🔋 5 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)? =
  40. 40.🔋 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)? =

Answer key

  1. True
  2. True
  3. + (positive)
  4. 7.5
  5. 8
  6. 6
  7. 24
  8. two or more cells joined
  9. False
  10. 12
  11. False
  12. True
  13. 16
  14. 9
  15. − (negative)
  16. 6
  17. 14
  18. 1.5
  19. the same voltage
  20. − (negative)
  21. a bigger voltage
  22. 3
  23. 1.5 V
  24. False
  25. + (positive)
  26. True
  27. + (positive)
  28. True
  29. 5
  30. 3
  31. 1.2
  32. 1.5
  33. − (negative)
  34. 1.2
  35. False
  36. False
  37. 3
  38. False
  39. 3
  40. 6

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