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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 154 · 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) a kind of bulb (b) a switch with a lid (c) one single wire (d) two or more cells joined
  2. 2.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) a bigger voltage (d) no voltage
  3. 3.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  4. 4.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  5. 5.🔋 How many 3 V cells must be joined in series to give 6 V?
  6. 6.🔋 What should you do with used-up cells? (a) bury them in soil (b) throw them in a fire (c) give them for recycling (d) cut them open
  7. 7.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 230 V (c) 1.5 V (d) 15 V
  8. 8.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  9. 9.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  10. 10.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  11. 11.🔋 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)? =
  12. 12.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  13. 13.🔋 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)? =
  14. 14.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  15. 15.🔋 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)? =
  16. 16.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) half the voltage (d) double the voltage
  17. 17.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  18. 18.🔋 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)? =
  19. 19.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  20. 20.🔋 How many 3 V cells must be joined in series to give 21 V?
  21. 21.🔋 How many 3 V cells must be joined in series to give 12 V?
  22. 22.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  23. 23.🔋 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)? =
  24. 24.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  25. 25.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  26. 26.🔋 3 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)? =
  27. 27.🔋 How many 3 V cells must be joined in series to give 9 V?
  28. 28.🔋 8 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.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
  30. 30.🔋 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)? =
  31. 31.🔋 How many 2 V cells must be joined in series to give 4 V?
  32. 32.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  33. 33.🔋 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)? =
  34. 34.🔋 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)? =
  35. 35.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
  36. 36.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  37. 37.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  38. 38.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  39. 39.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  40. 40.🔋 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)? =

Answer key

  1. two or more cells joined
  2. a bigger voltage
  3. + (positive)
  4. − (negative)
  5. 2
  6. give them for recycling
  7. 1.5 V
  8. + (positive)
  9. − (negative)
  10. + (positive)
  11. 1.2
  12. False
  13. 2
  14. − (negative)
  15. 9
  16. the same voltage
  17. 16
  18. 6
  19. 6
  20. 7
  21. 4
  22. True
  23. 15
  24. False
  25. 6
  26. 1.5
  27. 3
  28. 9.6
  29. False
  30. 18
  31. 2
  32. True
  33. 16.5
  34. 7.5
  35. 2
  36. 18
  37. 14
  38. 6
  39. True
  40. 1.5

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