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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 9 · 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) − (negative) (b) + (positive)
  2. 2.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  3. 3.🔋 How many 2 V cells must be joined in series to give 12 V?
  4. 4.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  5. 5.🔋 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)? =
  6. 6.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  7. 7.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  8. 8.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) double the voltage (d) the same voltage
  9. 9.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  10. 10.🔋 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)? =
  11. 11.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) cut them open (d) give them for recycling
  12. 12.🔋 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)? =
  13. 13.🔋 7 identical 1.5 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 one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
  15. 15.🔋 How many 3 V cells must be joined in series to give 12 V?
  16. 16.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 15 V (c) 1.5 V (d) 0.5 V
  17. 17.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
  18. 18.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  19. 19.🔋 4 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)? =
  20. 20.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  21. 21.🔋 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)? =
  22. 22.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  23. 23.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  24. 24.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  25. 25.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  26. 26.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
  27. 27.🔋 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)? =
  28. 28.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  29. 29.🔋 How many 3 V cells must be joined in series to give 24 V?
  30. 30.🔋 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)? =
  31. 31.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  32. 32.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  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.🔋 How many 1.2 V cells must be joined in series to give 6 V?
  35. 35.🔋 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)? =
  36. 36.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  37. 37.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
  38. 38.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  39. 39.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  40. 40.🔋 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

Answer key

  1. − (negative)
  2. False
  3. 6
  4. + (positive)
  5. 13.5
  6. + (positive)
  7. False
  8. the same voltage
  9. False
  10. 2
  11. give them for recycling
  12. 4.5
  13. 10.5
  14. 4.5
  15. 4
  16. 1.5 V
  17. 3
  18. 13.5
  19. 3
  20. True
  21. 9
  22. − (negative)
  23. − (negative)
  24. True
  25. 2.4
  26. 7
  27. 10.5
  28. False
  29. 8
  30. 16.5
  31. 6
  32. 9
  33. 1.2
  34. 5
  35. 3
  36. True
  37. 2
  38. 10
  39. False
  40. two or more cells joined

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