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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 94 · 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 longer symbol line” means the − (negative) end. (a) True (b) False
  2. 2.🔋 4 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)? =
  3. 3.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  4. 4.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  5. 5.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) half the voltage (d) the same voltage
  6. 6.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  7. 7.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  8. 8.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) a bigger voltage (c) no voltage (d) the same voltage
  9. 9.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  10. 10.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  11. 11.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  12. 12.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  13. 13.🔋 How many 3 V cells must be joined in series to give 9 V?
  14. 14.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  15. 15.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  16. 16.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  17. 17.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  18. 18.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  19. 19.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  20. 20.🔋 How many 2 V cells must be joined in series to give 4 V?
  21. 21.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  22. 22.🔋 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)? =
  23. 23.🔋 What is a battery? (a) two or more cells joined (b) one single wire (c) a switch with a lid (d) a kind of bulb
  24. 24.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  25. 25.🔋 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)? =
  26. 26.🔋 A 6 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  27. 27.🔋 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)? =
  28. 28.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  29. 29.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
  30. 30.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  31. 31.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 15 V (d) 230 V
  32. 32.🔋 How many 2 V cells must be joined in series to give 14 V?
  33. 33.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
  34. 34.🔋 What should you do with used-up cells? (a) cut them open (b) bury them in soil (c) give them for recycling (d) throw them in a fire
  35. 35.🔋 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)? =
  36. 36.🔋 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)? =
  37. 37.🔋 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)? =
  38. 38.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  39. 39.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  40. 40.🔋 4 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)? =

Answer key

  1. False
  2. 2
  3. False
  4. False
  5. the same voltage
  6. + (positive)
  7. True
  8. a bigger voltage
  9. False
  10. + (positive)
  11. 2.4
  12. − (negative)
  13. 3
  14. − (negative)
  15. 8
  16. 15
  17. 8.4
  18. + (positive)
  19. − (negative)
  20. 2
  21. True
  22. 7.5
  23. two or more cells joined
  24. True
  25. 1.5
  26. 10.5
  27. 9
  28. 7
  29. 6
  30. False
  31. 1.5 V
  32. 7
  33. 7
  34. give them for recycling
  35. 4.5
  36. 10.5
  37. 1.2
  38. True
  39. 12
  40. 1.2

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