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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 15 · 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.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  2. 2.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
  3. 3.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  4. 4.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a bigger voltage (d) a smaller voltage
  5. 5.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  6. 6.🔋 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)? =
  7. 7.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  8. 8.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  9. 9.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  10. 10.🔋 2 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)? =
  11. 11.🔋 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)? =
  12. 12.🔋 2 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)? =
  13. 13.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
  14. 14.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  15. 15.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 1.5 V (c) 230 V (d) 15 V
  16. 16.🔋 What is a battery? (a) one single wire (b) two or more cells joined (c) a kind of bulb (d) a switch with a lid
  17. 17.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  18. 18.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  19. 19.🔋 Identical cells side by side (in parallel) give … (a) double the voltage (b) no voltage (c) the same voltage (d) half the voltage
  20. 20.🔋 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)? =
  21. 21.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  22. 22.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  23. 23.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  24. 24.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  25. 25.🔋 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)? =
  26. 26.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  27. 27.🔋 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)? =
  28. 28.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  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, “the end with a bump” means the − (negative) end. (a) True (b) False
  31. 31.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  32. 32.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  33. 33.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
  34. 34.🔋 How many 1.5 V cells must be joined in series to give 3 V?
  35. 35.🔋 What should you do with used-up cells? (a) cut them open (b) give them for recycling (c) bury them in soil (d) throw them in a fire
  36. 36.🔋 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)? =
  37. 37.🔋 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)? =
  38. 38.🔋 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)? =
  39. 39.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  40. 40.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True

Answer key

  1. True
  2. 5
  3. 4
  4. a bigger voltage
  5. − (negative)
  6. 3
  7. + (positive)
  8. − (negative)
  9. 12
  10. 3
  11. 1.5
  12. 2
  13. 7
  14. False
  15. 1.5 V
  16. two or more cells joined
  17. − (negative)
  18. 2.4
  19. the same voltage
  20. 2
  21. True
  22. True
  23. False
  24. False
  25. 10.5
  26. + (positive)
  27. 4.5
  28. True
  29. 12
  30. False
  31. 7
  32. 6
  33. True
  34. 2
  35. give them for recycling
  36. 9
  37. 15
  38. 12
  39. False
  40. False

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