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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 918 · 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.🔋 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)? =
  2. 2.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a bigger voltage (d) a smaller voltage
  3. 3.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 230 V (d) 0.5 V
  4. 4.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  5. 5.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
  6. 6.🔋 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)? =
  7. 7.🔋 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)? =
  8. 8.🔋 What is a battery? (a) two or more cells joined (b) a kind of bulb (c) a switch with a lid (d) one single wire
  9. 9.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  10. 10.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
  11. 11.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  12. 12.🔋 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
  13. 13.🔋 How many 3 V cells must be joined in series to give 18 V?
  14. 14.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  15. 15.🔋 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)? =
  16. 16.🔋 How many 3 V cells must be joined in series to give 21 V?
  17. 17.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  18. 18.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  19. 19.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  20. 20.🔋 8 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)? =
  21. 21.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  22. 22.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  23. 23.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  24. 24.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  25. 25.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  26. 26.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  27. 27.🔋 5 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  28. 28.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  29. 29.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) the same voltage (d) double the voltage
  30. 30.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  31. 31.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
  32. 32.🔋 How many 3 V cells must be joined in series to give 12 V?
  33. 33.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  34. 34.🔋 How many 3 V cells must be joined in series to give 9 V?
  35. 35.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  36. 36.🔋 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)? =
  37. 37.🔋 5 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)? =
  38. 38.🔋 How many 1.2 V cells must be joined in series to give 6 V?
  39. 39.🔋 8 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  40. 40.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =

Answer key

  1. 7.5
  2. a bigger voltage
  3. 1.5 V
  4. True
  5. False
  6. 1.5
  7. 2
  8. two or more cells joined
  9. 12
  10. False
  11. − (negative)
  12. give them for recycling
  13. 6
  14. + (positive)
  15. 6
  16. 7
  17. False
  18. + (positive)
  19. 3
  20. 9
  21. − (negative)
  22. False
  23. False
  24. True
  25. True
  26. − (negative)
  27. 7.5
  28. True
  29. the same voltage
  30. True
  31. 2
  32. 4
  33. 15
  34. 3
  35. 6
  36. 2
  37. 4.5
  38. 5
  39. 9.6
  40. 4.8

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