Following will occur if level of electrolyte falls below plates

capacity of the cell is reduced
life of the cell is reduced
open plates are converted to lead sulphate
all above

The correct answer is: D. all above.

If the level of electrolyte falls below the plates, the following will occur:

  • The capacity of the cell is reduced. This is because the electrolyte is necessary for the chemical reaction that powers the battery. If there is not enough electrolyte, the reaction cannot take place as efficiently, and the battery will not be able to store as much charge.
  • The life of the cell is reduced. This is because the electrolyte also helps to protect the plates from corrosion. If there is not enough electrolyte, the plates will be more likely to corrode, which will shorten the life of the battery.
  • Open plates are converted to lead sulphate. This is because the electrolyte is a solution of sulfuric acid. When the electrolyte falls below the plates, the sulfuric acid will react with the lead in the plates to form lead sulphate. This will reduce the capacity of the battery and shorten its life.

It is important to keep the level of electrolyte in a lead-acid battery above the plates. This can be done by checking the level regularly and adding more electrolyte if necessary.