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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 200 · 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 longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  3. 3.🔋 How many 2 V cells must be joined in series to give 12 V?
  4. 4.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  5. 5.🔋 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)? =
  6. 6.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  7. 7.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  8. 8.🔋 3 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)? =
  9. 9.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  10. 10.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  11. 11.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  12. 12.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  13. 13.🔋 How many 3 V cells must be joined in series to give 9 V?
  14. 14.🔋 How many 1.5 V cells must be joined in series to give 3 V?
  15. 15.🔋 2 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)? =
  16. 16.🔋 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)? =
  17. 17.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) double the voltage (c) the same voltage (d) half the voltage
  18. 18.🔋 How many 2 V cells must be joined in series to give 16 V?
  19. 19.🔋 How many volts does one ordinary torch cell give? (a) 230 V (b) 15 V (c) 1.5 V (d) 0.5 V
  20. 20.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  21. 21.🔋 A 9 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  22. 22.🔋 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)? =
  23. 23.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  24. 24.🔋 How many 2 V cells must be joined in series to give 8 V?
  25. 25.🔋 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)? =
  26. 26.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) a bigger voltage (d) no voltage
  27. 27.🔋 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)? =
  28. 28.🔋 How many 1.5 V cells must be joined in series to give 6 V?
  29. 29.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  30. 30.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  31. 31.🔋 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)? =
  32. 32.🔋 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)? =
  33. 33.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  34. 34.🔋 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)? =
  35. 35.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  36. 36.🔋 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)? =
  37. 37.🔋 How many 3 V cells must be joined in series to give 15 V?
  38. 38.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  39. 39.🔋 4 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)? =
  40. 40.🔋 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)? =

Answer key

  1. + (positive)
  2. + (positive)
  3. 6
  4. 13.5
  5. 1.5
  6. − (negative)
  7. − (negative)
  8. 1.2
  9. + (positive)
  10. True
  11. 2.4
  12. False
  13. 3
  14. 2
  15. 1.5
  16. 15
  17. the same voltage
  18. 8
  19. 1.5 V
  20. − (negative)
  21. 15
  22. 6
  23. True
  24. 4
  25. 2
  26. a bigger voltage
  27. 12
  28. 4
  29. False
  30. True
  31. 7.5
  32. 1.2
  33. False
  34. 9
  35. True
  36. 3
  37. 5
  38. False
  39. 1.2
  40. 9

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