Question 252Electricity & Electronics - 1st Asst/Chief

The correct answer is B) lower than in a discharged battery. In a fully charged lead-acid battery, the electrolyte consists primarily of sulfuric acid (H2SO4) and water. As the battery discharges, the sulfuric acid is converted to lead sulfate, which reduces the concentration of the acid in the electrolyte. This lower acid concentration in a discharged battery results in a higher freezing point compared to a fully charged battery, where the higher acid concentration lowers the freezing point. The other options are incorrect because: A) The freezing point is not the same, as it is influenced by the concentration of the electrolyte. C) The freezing point is lower, not higher, in a fully charged battery. D) There is a correlation between the state of charge and the freezing point of the electrolyte.