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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 132 · 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 black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  2. 2.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  3. 3.🔋 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)? =
  4. 4.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  5. 5.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) no voltage (c) the same voltage (d) double the voltage
  6. 6.🔋 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
  7. 7.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  8. 8.🔋 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)? =
  9. 9.🔋 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)? =
  10. 10.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  11. 11.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  12. 12.🔋 How many volts does one ordinary torch cell give? (a) 0.5 V (b) 15 V (c) 230 V (d) 1.5 V
  13. 13.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  14. 14.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  15. 15.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  16. 16.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  17. 17.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
  18. 18.🔋 How many 2 V cells must be joined in series to give 10 V?
  19. 19.🔋 What should you do with used-up cells? (a) throw them in a fire (b) cut them open (c) give them for recycling (d) bury them in soil
  20. 20.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  21. 21.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  22. 22.🔋 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)? =
  23. 23.🔋 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)? =
  24. 24.🔋 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)? =
  25. 25.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  26. 26.🔋 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)? =
  27. 27.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  28. 28.🔋 How many 3 V cells must be joined in series to give 15 V?
  29. 29.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
  30. 30.🔋 How many 2 V cells must be joined in series to give 16 V?
  31. 31.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  32. 32.🔋 A 3 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
  33. 33.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  34. 34.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) no voltage (c) a smaller voltage (d) a bigger voltage
  35. 35.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  36. 36.🔋 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)? =
  37. 37.🔋 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)? =
  38. 38.🔋 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)? =
  39. 39.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
  40. 40.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?

Answer key

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

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