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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 215 · 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.🔋 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)? =
  2. 2.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  3. 3.🔋 6 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)? =
  4. 4.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  5. 5.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) the same voltage (c) a smaller voltage (d) no voltage
  6. 6.🔋 How many 2 V cells must be joined in series to give 16 V?
  7. 7.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 1.5 V (c) 230 V (d) 0.5 V
  8. 8.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  9. 9.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  10. 10.🔋 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)? =
  11. 11.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  12. 12.🔋 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)? =
  13. 13.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  14. 14.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  15. 15.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  16. 16.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  17. 17.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  18. 18.🔋 What is a battery? (a) one single wire (b) a switch with a lid (c) two or more cells joined (d) a kind of bulb
  19. 19.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  20. 20.🔋 5 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  21. 21.🔋 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)? =
  22. 22.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  23. 23.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
  24. 24.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  25. 25.🔋 What should you do with used-up cells? (a) give them for recycling (b) cut them open (c) throw them in a fire (d) bury them in soil
  26. 26.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
  27. 27.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  28. 28.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
  29. 29.🔋 5 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  30. 30.🔋 5 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)? =
  31. 31.🔋 A 12 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.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
  33. 33.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) True (b) False
  34. 34.🔋 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)? =
  35. 35.🔋 4 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)? =
  36. 36.🔋 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)? =
  37. 37.🔋 5 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)? =
  38. 38.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  39. 39.🔋 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)? =
  40. 40.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True

Answer key

  1. 2
  2. False
  3. 2
  4. − (negative)
  5. a bigger voltage
  6. 8
  7. 1.5 V
  8. True
  9. False
  10. 1.5
  11. False
  12. 1.5
  13. − (negative)
  14. + (positive)
  15. 10.5
  16. 3
  17. True
  18. two or more cells joined
  19. + (positive)
  20. 10
  21. 2
  22. True
  23. True
  24. − (negative)
  25. give them for recycling
  26. 13.5
  27. False
  28. 5
  29. 6
  30. 2
  31. 18
  32. 7
  33. False
  34. 7.5
  35. 1.5
  36. 9
  37. 3
  38. True
  39. 3
  40. True

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