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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 159 · 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 1.5 V cells must be joined in series to give 9 V?
  2. 2.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  3. 3.🔋 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)? =
  4. 4.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  5. 5.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  6. 6.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) a kind of bulb (d) two or more cells joined
  7. 7.🔋 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)? =
  8. 8.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  9. 9.🔋 How many 3 V cells must be joined in series to give 9 V?
  10. 10.🔋 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)? =
  11. 11.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  12. 12.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  13. 13.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  14. 14.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  15. 15.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
  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.🔋 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)? =
  18. 18.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  19. 19.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  20. 20.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 230 V (d) 0.5 V
  21. 21.🔋 6 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)? =
  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.🔋 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)? =
  24. 24.🔋 How many 1.5 V cells must be joined in series to give 4.5 V?
  25. 25.🔋 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)? =
  26. 26.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  27. 27.🔋 6 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)? =
  28. 28.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  29. 29.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  30. 30.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
  31. 31.🔋 How many 3 V cells must be joined in series to give 15 V?
  32. 32.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  33. 33.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) half the voltage (c) the same voltage (d) no voltage
  34. 34.🔋 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
  35. 35.🔋 Cells joined + to − in a row (series) give … (a) no voltage (b) a smaller voltage (c) the same voltage (d) a bigger voltage
  36. 36.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  37. 37.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  38. 38.🔋 How many 1.2 V cells must be joined in series to give 6 V?
  39. 39.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  40. 40.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False

Answer key

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

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