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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 313 · 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.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  2. 2.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  3. 3.🔋 How many 1.5 V cells must be joined in series to give 4.5 V?
  4. 4.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  5. 5.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  6. 6.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  7. 7.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  8. 8.🔋 What should you do with used-up cells? (a) cut them open (b) bury them in soil (c) throw them in a fire (d) give them for recycling
  9. 9.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a smaller voltage (d) a bigger voltage
  10. 10.🔋 A 9 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  11. 11.🔋 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)? =
  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) − (negative) (b) + (positive)
  14. 14.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  15. 15.🔋 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)? =
  16. 16.🔋 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)? =
  17. 17.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  18. 18.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 230 V (c) 1.5 V (d) 0.5 V
  19. 19.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
  20. 20.🔋 How many 2 V cells must be joined in series to give 16 V?
  21. 21.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  22. 22.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  23. 23.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) the same voltage (c) half the voltage (d) double the voltage
  24. 24.🔋 8 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  25. 25.🔋 How many 3 V cells must be joined in series to give 21 V?
  26. 26.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  27. 27.🔋 How many 2 V cells must be joined in series to give 8 V?
  28. 28.🔋 6 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, “the longer symbol line” means the + (positive) end. (a) False (b) True
  30. 30.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
  31. 31.🔋 6 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  32. 32.🔋 How many 1.2 V cells must be joined in series to give 6 V?
  33. 33.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) True (b) False
  34. 34.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  35. 35.🔋 How many 3 V cells must be joined in series to give 24 V?
  36. 36.🔋 How many 1.5 V cells must be joined in series to give 12 V?
  37. 37.🔋 What is a battery? (a) a switch with a lid (b) two or more cells joined (c) a kind of bulb (d) one single wire
  38. 38.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  39. 39.🔋 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)? =
  40. 40.🔋 How many 2 V cells must be joined in series to give 10 V?

Answer key

  1. + (positive)
  2. − (negative)
  3. 3
  4. + (positive)
  5. False
  6. − (negative)
  7. + (positive)
  8. give them for recycling
  9. a bigger voltage
  10. 12
  11. 6
  12. False
  13. − (negative)
  14. 24
  15. 9
  16. 1.2
  17. 12
  18. 1.5 V
  19. 3
  20. 8
  21. False
  22. True
  23. the same voltage
  24. 16
  25. 7
  26. True
  27. 4
  28. 7.2
  29. True
  30. 7
  31. 18
  32. 5
  33. False
  34. 6
  35. 8
  36. 8
  37. two or more cells joined
  38. False
  39. 10.5
  40. 5

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