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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 114 · 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.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
  2. 2.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
  3. 3.🔋 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)? =
  4. 4.🔋 What is a battery? (a) one single wire (b) a kind of bulb (c) two or more cells joined (d) a switch with a lid
  5. 5.🔋 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)? =
  6. 6.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
  7. 7.🔋 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)? =
  8. 8.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) the same voltage (d) no voltage
  9. 9.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 230 V (d) 0.5 V
  10. 10.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  11. 11.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  12. 12.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  13. 13.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  14. 14.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  15. 15.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  16. 16.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) bury them in soil (d) give them for recycling
  17. 17.🔋 How many 3 V cells must be joined in series to give 21 V?
  18. 18.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  19. 19.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  20. 20.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  21. 21.🔋 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)? =
  22. 22.🔋 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)? =
  23. 23.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  24. 24.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  25. 25.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  26. 26.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  27. 27.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  28. 28.🔋 How many 1.5 V cells must be joined in series to give 12 V?
  29. 29.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  30. 30.🔋 How many 3 V cells must be joined in series to give 6 V?
  31. 31.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  32. 32.🔋 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)? =
  33. 33.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) a bigger voltage (d) no voltage
  34. 34.🔋 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)? =
  35. 35.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  36. 36.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  37. 37.🔋 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)? =
  38. 38.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  39. 39.🔋 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)? =
  40. 40.🔋 How many 3 V cells must be joined in series to give 9 V?

Answer key

  1. 2
  2. 4
  3. 6
  4. two or more cells joined
  5. 1.5
  6. False
  7. 7.5
  8. the same voltage
  9. 1.5 V
  10. 18
  11. False
  12. + (positive)
  13. True
  14. 7.2
  15. + (positive)
  16. give them for recycling
  17. 7
  18. 14
  19. True
  20. False
  21. 9
  22. 15
  23. True
  24. − (negative)
  25. − (negative)
  26. − (negative)
  27. + (positive)
  28. 8
  29. True
  30. 2
  31. 15
  32. 1.5
  33. a bigger voltage
  34. 1.5
  35. False
  36. 3.6
  37. 2
  38. 4.8
  39. 1.2
  40. 3

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