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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 604 · 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 end with a bump” means the + (positive) end. (a) False (b) True
  2. 2.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  3. 3.🔋 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)? =
  4. 4.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 15 V (d) 1.5 V
  5. 5.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  6. 6.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  7. 7.🔋 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)? =
  8. 8.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  9. 9.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  10. 10.🔋 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)? =
  11. 11.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  12. 12.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  13. 13.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  14. 14.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a smaller voltage (d) a bigger voltage
  15. 15.🔋 What is a battery? (a) a kind of bulb (b) a switch with a lid (c) one single wire (d) two or more cells joined
  16. 16.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  17. 17.🔋 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)? =
  18. 18.🔋 How many 2 V cells must be joined in series to give 4 V?
  19. 19.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  20. 20.🔋 How many 2 V cells must be joined in series to give 6 V?
  21. 21.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  22. 22.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  23. 23.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  24. 24.🔋 6 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)? =
  25. 25.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) bury them in soil (d) give them for recycling
  26. 26.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  27. 27.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  28. 28.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  29. 29.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
  30. 30.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  31. 31.🔋 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)? =
  32. 32.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  33. 33.🔋 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)? =
  34. 34.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  35. 35.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  36. 36.🔋 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)? =
  37. 37.🔋 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)? =
  38. 38.🔋 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)? =
  39. 39.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  40. 40.🔋 How many 1.5 V cells must be joined in series to give 4.5 V?

Answer key

  1. True
  2. 2.4
  3. 15
  4. 1.5 V
  5. − (negative)
  6. + (positive)
  7. 1.5
  8. − (negative)
  9. True
  10. 1.5
  11. − (negative)
  12. True
  13. False
  14. a bigger voltage
  15. two or more cells joined
  16. + (positive)
  17. 7.5
  18. 2
  19. 8.4
  20. 3
  21. 12
  22. 10.5
  23. False
  24. 1.2
  25. give them for recycling
  26. False
  27. False
  28. + (positive)
  29. 6
  30. 6
  31. 16.5
  32. 7
  33. 1.2
  34. 4.8
  35. 15
  36. 9
  37. 2
  38. 3
  39. 6
  40. 3

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