Electrolysis and Storage Batteries
Internal short circuits are caused by

excess accumulation of sediment at the bottom of the cell
breakdown of one or more separators
both of the options given here
none of the listed here

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Electrolysis and Storage Batteries
In a lead-acid cell, if the specific gravity of sulphuric acid is 1.8, it will require following ratio of acid to water to get mixture of specific gravity of 1.3

6 parts of acid to 4 parts of water
4 parts of acid to 4 parts of water
4 parts of acid to 6 parts of water
4 parts of acid to 8 parts of water

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