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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 3 · 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.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) the same voltage (c) half the voltage (d) double the voltage
  2. 2.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  3. 3.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  4. 4.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  5. 5.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  6. 6.🔋 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
  7. 7.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  8. 8.🔋 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)? =
  9. 9.🔋 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)? =
  10. 10.🔋 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)? =
  11. 11.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  12. 12.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  13. 13.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  14. 14.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  15. 15.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) throw them in a fire (d) bury them in soil
  16. 16.🔋 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)? =
  17. 17.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  18. 18.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  19. 19.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
  20. 20.🔋 How many 2 V cells must be joined in series to give 6 V?
  21. 21.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  22. 22.🔋 How many 1.5 V cells must be joined in series to give 6 V?
  23. 23.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  24. 24.🔋 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)? =
  25. 25.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  26. 26.🔋 A 12 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  27. 27.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
  28. 28.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  29. 29.🔋 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)? =
  30. 30.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  31. 31.🔋 How many 1.2 V cells must be joined in series to give 6 V?
  32. 32.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  33. 33.🔋 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)? =
  34. 34.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  35. 35.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a bigger voltage (c) the same voltage (d) a smaller voltage
  36. 36.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  37. 37.🔋 5 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)? =
  38. 38.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  39. 39.🔋 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)? =
  40. 40.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 0.5 V (d) 230 V

Answer key

  1. the same voltage
  2. 7
  3. + (positive)
  4. 9
  5. − (negative)
  6. two or more cells joined
  7. − (negative)
  8. 1.2
  9. 10.5
  10. 2
  11. 10
  12. 3.6
  13. 9
  14. True
  15. give them for recycling
  16. 6
  17. True
  18. 15
  19. 7.5
  20. 3
  21. + (positive)
  22. 4
  23. + (positive)
  24. 13.5
  25. True
  26. 18
  27. 5
  28. 4
  29. 3
  30. − (negative)
  31. 5
  32. 3
  33. 3
  34. False
  35. a bigger voltage
  36. True
  37. 1.5
  38. False
  39. 2
  40. 1.5 V

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