Question 544Electricity & Electronics - Assistant Engineer

The correct answer is A) comparing the specific gravity of the electrolyte in each cell. When troubleshooting a lead-acid storage battery, measuring the specific gravity of the electrolyte in each cell is the best method for detecting a weak or dead cell. This is because the specific gravity of the electrolyte is directly related to the state of charge of the cell. A lower specific gravity in one cell compared to the others indicates that the cell is weaker or potentially dead. The other options, such as measuring open-circuit voltage or visually inspecting the electrolyte levels, are not as reliable for detecting a weak cell.