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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 296 · 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 − (negative) end. (a) True (b) False
  2. 2.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  3. 3.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  4. 4.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  5. 5.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  6. 6.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 0.5 V (d) 230 V
  7. 7.🔋 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)? =
  8. 8.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  9. 9.🔋 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)? =
  10. 10.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) a smaller voltage (d) the same voltage
  11. 11.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  12. 12.🔋 How many 1.2 V cells must be joined in series to give 9.6 V?
  13. 13.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  14. 14.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  15. 15.🔋 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
  16. 16.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  17. 17.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  18. 18.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  19. 19.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
  20. 20.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  21. 21.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) double the voltage (d) no voltage
  22. 22.🔋 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)? =
  23. 23.🔋 How many 2 V cells must be joined in series to give 16 V?
  24. 24.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  25. 25.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  26. 26.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  27. 27.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  28. 28.🔋 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)? =
  29. 29.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  30. 30.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  31. 31.🔋 4 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.🔋 What should you do with used-up cells? (a) give them for recycling (b) throw them in a fire (c) bury them in soil (d) cut them open
  33. 33.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  34. 34.🔋 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)? =
  35. 35.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  36. 36.🔋 3 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)? =
  37. 37.🔋 4 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.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
  39. 39.🔋 5 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)? =
  40. 40.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)

Answer key

  1. False
  2. − (negative)
  3. + (positive)
  4. True
  5. False
  6. 1.5 V
  7. 15
  8. True
  9. 6
  10. a bigger voltage
  11. True
  12. 8
  13. 14
  14. 6
  15. two or more cells joined
  16. 9
  17. True
  18. − (negative)
  19. 2
  20. True
  21. the same voltage
  22. 9
  23. 8
  24. − (negative)
  25. 9
  26. 21
  27. + (positive)
  28. 3
  29. False
  30. True
  31. 1.5
  32. give them for recycling
  33. False
  34. 3
  35. False
  36. 1.5
  37. 4.8
  38. 5
  39. 1.5
  40. + (positive)

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