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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 77 · 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 flat end” means the − (negative) end. (a) True (b) False
  2. 2.🔋 What is a battery? (a) two or more cells joined (b) a kind of bulb (c) a switch with a lid (d) one single wire
  3. 3.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
  4. 4.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) the same voltage (c) no voltage (d) a smaller voltage
  5. 5.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  6. 6.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) half the voltage (d) double the voltage
  7. 7.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  8. 8.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  9. 9.🔋 8 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  10. 10.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
  11. 11.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  12. 12.🔋 A 6 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  13. 13.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  14. 14.🔋 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)? =
  15. 15.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  16. 16.🔋 7 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.🔋 How many 2 V cells must be joined in series to give 8 V?
  18. 18.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  19. 19.🔋 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)? =
  20. 20.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  21. 21.🔋 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)? =
  22. 22.🔋 How many 3 V cells must be joined in series to give 21 V?
  23. 23.🔋 6 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)? =
  24. 24.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 15 V (d) 0.5 V
  25. 25.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  26. 26.🔋 What should you do with used-up cells? (a) bury them in soil (b) give them for recycling (c) cut them open (d) throw them in a fire
  27. 27.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  28. 28.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  29. 29.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
  30. 30.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  31. 31.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  32. 32.🔋 How many 2 V cells must be joined in series to give 6 V?
  33. 33.🔋 How many 2 V cells must be joined in series to give 4 V?
  34. 34.🔋 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)? =
  35. 35.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  36. 36.🔋 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)? =
  37. 37.🔋 2 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 4.5 V?
  39. 39.🔋 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)? =
  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. True
  2. two or more cells joined
  3. False
  4. a bigger voltage
  5. + (positive)
  6. the same voltage
  7. + (positive)
  8. + (positive)
  9. 12
  10. False
  11. − (negative)
  12. 12
  13. False
  14. 15
  15. True
  16. 10.5
  17. 4
  18. False
  19. 2
  20. − (negative)
  21. 3
  22. 7
  23. 2
  24. 1.5 V
  25. True
  26. give them for recycling
  27. True
  28. 9
  29. 4
  30. 14
  31. 16
  32. 3
  33. 2
  34. 6
  35. − (negative)
  36. 7.5
  37. 2.4
  38. 3
  39. 4.5
  40. 2

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