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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 222 · 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.🔋 What is a battery? (a) one single wire (b) two or more cells joined (c) a switch with a lid (d) a kind of bulb
  2. 2.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  3. 3.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  4. 4.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  5. 5.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  6. 6.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 15 V (d) 0.5 V
  7. 7.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  8. 8.🔋 How many 2 V cells must be joined in series to give 8 V?
  9. 9.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  10. 10.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  11. 11.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  12. 12.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  13. 13.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) bury them in soil (d) cut them open
  14. 14.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  15. 15.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  16. 16.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  17. 17.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  18. 18.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  19. 19.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  20. 20.🔋 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)? =
  21. 21.🔋 3 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)? =
  22. 22.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) the same voltage (c) a bigger voltage (d) a smaller voltage
  23. 23.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) half the voltage (d) double the voltage
  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.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  26. 26.🔋 6 identical 1.2 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.🔋 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)? =
  29. 29.🔋 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)? =
  30. 30.🔋 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)? =
  31. 31.🔋 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)? =
  32. 32.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
  33. 33.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
  34. 34.🔋 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)? =
  35. 35.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  36. 36.🔋 How many 3 V cells must be joined in series to give 21 V?
  37. 37.🔋 A 3 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 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)? =
  39. 39.🔋 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)? =
  40. 40.🔋 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)? =

Answer key

  1. two or more cells joined
  2. False
  3. − (negative)
  4. False
  5. False
  6. 1.5 V
  7. + (positive)
  8. 4
  9. False
  10. True
  11. 7
  12. True
  13. give them for recycling
  14. − (negative)
  15. − (negative)
  16. True
  17. False
  18. 24
  19. + (positive)
  20. 4.5
  21. 2
  22. a bigger voltage
  23. the same voltage
  24. 1.2
  25. False
  26. 7.2
  27. + (positive)
  28. 12
  29. 10.5
  30. 15
  31. 1.5
  32. 7
  33. 4
  34. 3
  35. True
  36. 7
  37. 6
  38. 13.5
  39. 3
  40. 2

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