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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 28 · 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.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) no voltage (c) a bigger voltage (d) the same voltage
  2. 2.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  3. 3.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  4. 4.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  5. 5.🔋 4 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  6. 6.🔋 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)? =
  7. 7.🔋 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)? =
  8. 8.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  9. 9.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  10. 10.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  11. 11.🔋 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)? =
  12. 12.🔋 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
  13. 13.🔋 How many 1.5 V cells must be joined in series to give 9 V?
  14. 14.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  15. 15.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  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 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  18. 18.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  19. 19.🔋 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)? =
  20. 20.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) throw them in a fire (d) cut them open
  21. 21.🔋 5 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  22. 22.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  23. 23.🔋 How many 3 V cells must be joined in series to give 21 V?
  24. 24.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  25. 25.🔋 3 identical 3 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  26. 26.🔋 How many 3 V cells must be joined in series to give 6 V?
  27. 27.🔋 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)? =
  28. 28.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  29. 29.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
  30. 30.🔋 How many 1.5 V cells must be joined in series to give 12 V?
  31. 31.🔋 A 6 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.🔋 6 identical 3 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.🔋 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)? =
  34. 34.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  35. 35.🔋 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)? =
  36. 36.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  37. 37.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  38. 38.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
  39. 39.🔋 7 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.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)

Answer key

  1. a bigger voltage
  2. 9
  3. − (negative)
  4. − (negative)
  5. 3
  6. 4.5
  7. 2
  8. 4
  9. + (positive)
  10. True
  11. 9
  12. two or more cells joined
  13. 6
  14. 14
  15. False
  16. the same voltage
  17. 9.6
  18. True
  19. 2
  20. give them for recycling
  21. 15
  22. − (negative)
  23. 7
  24. 7.5
  25. 3
  26. 2
  27. 1.5
  28. True
  29. 6
  30. 8
  31. 12
  32. 3
  33. 9
  34. False
  35. 6
  36. False
  37. + (positive)
  38. 4
  39. 8.4
  40. + (positive)

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