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Electrolysis and Storage Batteries

Electrolysis and Storage Batteries
Satellite power requirement is provided through

nickel-cadmium cells
lead-acid batteries
solar cells
dry cells

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Electrolysis and Storage Batteries
Lead-acid cell has a life of nearly charges and discharges

1000
700
1250
500

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Electrolysis and Storage Batteries
On overcharging a battery

It will raise the specific gravity of the electrolyte
It will increase the capacity of the battery
It will bring about chemical change in active materials
None of these

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Electrolysis and Storage Batteries
In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following

three parts H2O, one part H₂SO₄
all H₂SO₄
one part H2O, three parts H₂SO₄
two parts H2O, two parts H₂SO₄

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Electrolysis and Storage Batteries
Local action in a battery is indicated by

excessive gassing under load conditions
excessive drop in the specific gravity of electrolyte even when the cell is on open circuit
none of the listed here
both of the listed here

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Electrolysis and Storage Batteries
The active materials of a nickel-iron battery are

nickel hydroxide
powdered iron and its oxide
all of these
21% solution of kOH

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