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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 68 · 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 black wire” means the − (negative) end. (a) False (b) True
  2. 2.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  3. 3.🔋 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)? =
  4. 4.🔋 What should you do with used-up cells? (a) throw them in a fire (b) give them for recycling (c) cut them open (d) bury them in soil
  5. 5.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  6. 6.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  7. 7.🔋 2 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  8. 8.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  9. 9.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  10. 10.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  11. 11.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) − (negative) (b) + (positive)
  12. 12.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  13. 13.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  14. 14.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
  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.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) no voltage (c) the same voltage (d) a smaller voltage
  17. 17.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  18. 18.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  19. 19.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  20. 20.🔋 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)? =
  21. 21.🔋 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)? =
  22. 22.🔋 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)? =
  23. 23.🔋 Identical cells side by side (in parallel) give … (a) no voltage (b) double the voltage (c) half the voltage (d) the same voltage
  24. 24.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  25. 25.🔋 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)? =
  26. 26.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  27. 27.🔋 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)? =
  28. 28.🔋 4 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  29. 29.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  30. 30.🔋 What is a battery? (a) a kind of bulb (b) two or more cells joined (c) a switch with a lid (d) one single wire
  31. 31.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  32. 32.🔋 How many 2 V cells must be joined in series to give 14 V?
  33. 33.🔋 3 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)? =
  34. 34.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  35. 35.🔋 How many 1.2 V cells must be joined in series to give 6 V?
  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.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  38. 38.🔋 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)? =
  39. 39.🔋 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)? =
  40. 40.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False

Answer key

  1. True
  2. + (positive)
  3. 12
  4. give them for recycling
  5. − (negative)
  6. + (positive)
  7. 2.4
  8. 8
  9. 9
  10. False
  11. + (positive)
  12. 6
  13. True
  14. 7.5
  15. 10.5
  16. a bigger voltage
  17. − (negative)
  18. True
  19. 3.6
  20. 1.2
  21. 3
  22. 7.5
  23. the same voltage
  24. False
  25. 3
  26. − (negative)
  27. 4.5
  28. 4.8
  29. True
  30. two or more cells joined
  31. True
  32. 7
  33. 1.5
  34. False
  35. 5
  36. 9
  37. 8.4
  38. 10.5
  39. 2
  40. False

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