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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 260 · 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.🔋 4 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 end with a bump” means the + (positive) end. (a) True (b) False
  3. 3.True or false: on a cell, “the end with a bump” means the − (negative) end. (a) True (b) False
  4. 4.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  5. 5.🔋 What should you do with used-up cells? (a) cut them open (b) bury them in soil (c) throw them in a fire (d) give them for recycling
  6. 6.🔋 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)? =
  7. 7.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 0.5 V (c) 15 V (d) 230 V
  8. 8.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  9. 9.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
  10. 10.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) False (b) True
  11. 11.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  12. 12.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) False (b) True
  13. 13.🔋 2 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.🔋 How many 2 V cells must be joined in series to give 10 V?
  15. 15.🔋 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)? =
  16. 16.🔋 8 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  17. 17.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  18. 18.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  19. 19.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  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.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  22. 22.🔋 How many 1.5 V cells must be joined in series to give 10.5 V?
  23. 23.🔋 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)? =
  24. 24.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  25. 25.🔋 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)? =
  26. 26.🔋 How many 1.5 V cells must be joined in series to give 7.5 V?
  27. 27.🔋 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)? =
  28. 28.🔋 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)? =
  29. 29.🔋 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)? =
  30. 30.🔋 How many 3 V cells must be joined in series to give 6 V?
  31. 31.🔋 How many 3 V cells must be joined in series to give 9 V?
  32. 32.🔋 6 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  33. 33.🔋 5 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)? =
  34. 34.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  35. 35.🔋 How many 1.2 V cells must be joined in series to give 6 V?
  36. 36.🔋 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)? =
  37. 37.🔋 4 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  38. 38.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  39. 39.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  40. 40.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =

Answer key

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

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