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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 124 · 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.🔋 7 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  2. 2.🔋 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)? =
  3. 3.True or false: on a cell, “the flat end” means the − (negative) end. (a) False (b) True
  4. 4.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  5. 5.🔋 How many volts does one ordinary torch cell give? (a) 1.5 V (b) 15 V (c) 230 V (d) 0.5 V
  6. 6.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  7. 7.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  8. 8.🔋 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)? =
  9. 9.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  10. 10.🔋 3 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  11. 11.🔋 Cells joined + to − in a row (series) give … (a) a smaller voltage (b) the same voltage (c) no voltage (d) a bigger voltage
  12. 12.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  13. 13.🔋 How many 3 V cells must be joined in series to give 12 V?
  14. 14.🔋 What is a battery? (a) a switch with a lid (b) a kind of bulb (c) two or more cells joined (d) one single wire
  15. 15.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  16. 16.True or false: on a cell, “the shorter symbol line” means the − (negative) end. (a) True (b) False
  17. 17.🔋 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)? =
  18. 18.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  19. 19.🔋 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)? =
  20. 20.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) True (b) False
  21. 21.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  22. 22.🔋 2 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  23. 23.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  24. 24.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  25. 25.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
  26. 26.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) double the voltage (c) half the voltage (d) no voltage
  27. 27.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  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.🔋 How many 3 V cells must be joined in series to give 21 V?
  30. 30.🔋 A 9 V battery and three 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  31. 31.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  32. 32.🔋 How many 1.2 V cells must be joined in series to give 2.4 V?
  33. 33.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  34. 34.🔋 How many 1.2 V cells must be joined in series to give 3.6 V?
  35. 35.🔋 3 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  36. 36.🔋 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
  37. 37.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  38. 38.🔋 How many 3 V cells must be joined in series to give 9 V?
  39. 39.🔋 7 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  40. 40.🔋 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)? =

Answer key

  1. 8.4
  2. 3
  3. True
  4. − (negative)
  5. 1.5 V
  6. 7
  7. + (positive)
  8. 1.5
  9. False
  10. 9
  11. a bigger voltage
  12. False
  13. 4
  14. two or more cells joined
  15. True
  16. True
  17. 9
  18. 6
  19. 15
  20. True
  21. 12
  22. 4
  23. 3.6
  24. − (negative)
  25. 10.5
  26. the same voltage
  27. + (positive)
  28. 12
  29. 7
  30. 13.5
  31. + (positive)
  32. 2
  33. 7.2
  34. 3
  35. 4.5
  36. give them for recycling
  37. − (negative)
  38. 3
  39. 14
  40. 1.2

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