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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 54 · 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.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  2. 2.True or false: on a cell, “the longer symbol line” means the − (negative) end. (a) True (b) False
  3. 3.🔋 Identical cells side by side (in parallel) give … (a) the same voltage (b) no voltage (c) half the voltage (d) double the voltage
  4. 4.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  5. 5.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  6. 6.🔋 3 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  7. 7.🔋 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
  8. 8.🔋 How many 2 V cells must be joined in series to give 10 V?
  9. 9.🔋 Cells joined + to − in a row (series) give … (a) a bigger voltage (b) a smaller voltage (c) the same voltage (d) no voltage
  10. 10.True or false: on a cell, “the flat end” means the − (negative) end. (a) True (b) False
  11. 11.🔋 How many 1.5 V cells must be joined in series to give 9 V?
  12. 12.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  13. 13.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  14. 14.🔋 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)? =
  15. 15.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) − (negative) (b) + (positive)
  16. 16.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) True (b) False
  17. 17.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  18. 18.🔋 How many 3 V cells must be joined in series to give 6 V?
  19. 19.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
  20. 20.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) False (b) True
  21. 21.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  22. 22.🔋 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)? =
  23. 23.🔋 How many 1.5 V cells must be joined in series to give 12 V?
  24. 24.🔋 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)? =
  25. 25.🔋 How many 3 V cells must be joined in series to give 15 V?
  26. 26.🔋 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)? =
  27. 27.🔋 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)? =
  28. 28.🔋 On a cell, does “the shorter symbol line” mean the + end or the − end? (a) + (positive) (b) − (negative)
  29. 29.🔋 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)? =
  30. 30.🔋 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)? =
  31. 31.🔋 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)? =
  32. 32.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) True (b) False
  33. 33.🔋 How many 1.5 V cells must be joined in series to give 4.5 V?
  34. 34.🔋 How many 3 V cells must be joined in series to give 12 V?
  35. 35.🔋 4 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  36. 36.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  37. 37.🔋 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)? =
  38. 38.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  39. 39.🔋 2 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)? =
  40. 40.🔋 How many 2 V cells must be joined in series to give 8 V?

Answer key

  1. + (positive)
  2. False
  3. the same voltage
  4. False
  5. − (negative)
  6. 3.6
  7. give them for recycling
  8. 5
  9. a bigger voltage
  10. True
  11. 6
  12. + (positive)
  13. False
  14. 3
  15. − (negative)
  16. True
  17. + (positive)
  18. 2
  19. 4
  20. True
  21. False
  22. 4.5
  23. 8
  24. 3
  25. 5
  26. 3
  27. 1.5
  28. − (negative)
  29. 13.5
  30. 2
  31. 2
  32. True
  33. 3
  34. 4
  35. 12
  36. 6
  37. 7.5
  38. 9
  39. 1.2
  40. 4

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