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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 1 · 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 “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  2. 2.🔋 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)? =
  3. 3.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  4. 4.🔋 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)? =
  5. 5.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  6. 6.🔋 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)? =
  7. 7.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 1.5 V (c) 0.5 V (d) 15 V
  8. 8.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  9. 9.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
  10. 10.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  11. 11.🔋 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)? =
  12. 12.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  13. 13.🔋 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)? =
  14. 14.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) a smaller voltage (c) the same voltage (d) no voltage
  15. 15.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
  16. 16.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) one single wire (d) a kind of bulb
  17. 17.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  18. 18.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  19. 19.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) bury them in soil (d) throw them in a fire
  20. 20.🔋 4 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)? =
  21. 21.🔋 How many 2 V cells must be joined in series to give 10 V?
  22. 22.🔋 7 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  23. 23.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  24. 24.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  25. 25.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  26. 26.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  27. 27.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  28. 28.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  29. 29.🔋 2 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)? =
  30. 30.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) the same voltage (c) no voltage (d) double the voltage
  31. 31.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  32. 32.🔋 How many 1.5 V cells must be joined in series to give 6 V?
  33. 33.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  34. 34.🔋 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)? =
  35. 35.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  36. 36.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  37. 37.🔋 How many 1.2 V cells must be joined in series to give 4.8 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.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  40. 40.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)

Answer key

  1. + (positive)
  2. 1.5
  3. False
  4. 2
  5. False
  6. 16.5
  7. 1.5 V
  8. − (negative)
  9. False
  10. False
  11. 6
  12. False
  13. 13.5
  14. a bigger voltage
  15. 6
  16. two or more cells joined
  17. − (negative)
  18. − (negative)
  19. give them for recycling
  20. 1.5
  21. 5
  22. 21
  23. 3
  24. 4.8
  25. 6
  26. True
  27. True
  28. 2.4
  29. 1.5
  30. the same voltage
  31. + (positive)
  32. 4
  33. True
  34. 3
  35. True
  36. True
  37. 4
  38. 10
  39. 4
  40. + (positive)

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