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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 402 · 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.🔋 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)? =
  2. 2.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  3. 3.🔋 What is a battery? (a) a switch with a lid (b) one single wire (c) a kind of bulb (d) two or more cells joined
  4. 4.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  5. 5.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  6. 6.🔋 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)? =
  7. 7.🔋 What should you do with used-up cells? (a) give them for recycling (b) bury them in soil (c) cut them open (d) throw them in a fire
  8. 8.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  9. 9.🔋 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)? =
  10. 10.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  11. 11.🔋 2 identical 1.5 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, “usually the red wire” means the − (negative) end. (a) True (b) False
  13. 13.🔋 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)? =
  14. 14.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  15. 15.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  16. 16.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) False (b) True
  17. 17.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
  18. 18.🔋 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)? =
  19. 19.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) no voltage (d) the same voltage
  20. 20.🔋 4 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  21. 21.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
  22. 22.🔋 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)? =
  23. 23.🔋 How many 2 V cells must be joined in series to give 10 V?
  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.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  26. 26.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  27. 27.🔋 6 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  28. 28.🔋 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)? =
  29. 29.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  30. 30.🔋 How many 3 V cells must be joined in series to give 21 V?
  31. 31.🔋 How many 2 V cells must be joined in series to give 8 V?
  32. 32.🔋 A 3 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  33. 33.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
  34. 34.True or false: on a cell, “the flat end” means the + (positive) end. (a) True (b) False
  35. 35.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  36. 36.🔋 How many 2 V cells must be joined in series to give 12 V?
  37. 37.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  38. 38.🔋 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)? =
  39. 39.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) False (b) True
  40. 40.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?

Answer key

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

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