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Electrolysis and Storage of Batteries - Interview Questions and Answers

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46. During the charging of a lead-acid cell
A. its voltage increases
B. it gives out energy
C. its cathode becomes dark chocolate brown in colour
D. specific gravity of H2SO4 decreases
Explanation:
47. 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
Explanation:
48. The substances which combine together to store electrical energy during the charge are called ______ materials
A. active
B. passive
C. inert
D. dielectric
Explanation:
49. On the average the ampere-hour efficiency of an Edison cell is about
A. 40%
B. 60%
C. 70%
D. 80%
Explanation:
50. Negative plate of an Edison cell is made of
A. copper
B. lead
C. iron
D. silver oxide
Explanation:
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