A. its voltage increases
B. it gives out energy
C. its cathode becomes dark chocolate brown in colour
D. specific gravity of H2SO4 decreases
Related Mcqs:
- During charging the specific gravity of the electrolyte of a lead-acid battery
A. increases
B. decreases
C. remains the same
D. becomes zero - 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
A. 6 parts of acid to 4 parts of water
B. 4 parts of acid to 4 parts of water
C. 4 parts of acid to 6 parts of water
D. 4 parts of acid to 8 parts of water - As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of___________?
A. reducing time of charging
B. increasing cell capacity
C. both (A) and (B)
D. avoiding excessive gassing - In constant voltage charging method, the charging current from discharged to fully charged condition_____________?
A. decreases
B. increases
C. remains constant
D. none of the above - Under normal charging rate, the charging current should be__________?
A. 10% of capacity
B. 20% of capacity
C. 30% of capacity
D. 40% of capacity - In a lead-acid cell, lead is called as____________?
A. positive active material
B. negative active material
C. passive material
D. none of the above - In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following__________?
A. one part H2O, three parts H2SO4
B. two parts H2O, two parts H2SO4
C. three parts H2O, one part H2SO4
D. all H2S04 - During the charging and discharging of a nickel-iron cell____________?
A. corrosive fumes are produced
B. water is neither formed nor absorbed
C. nickel hydroxide remains unsplit
D. its e.m.f. remains constant - Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as________materials
A. passive
B. active
C. redundant
D. inert - Hydrogen evolved during charging produces explosive mixture when it is more than___________?
A. 2%
B. 4%
C. 6%
D. 8%
