A. amperes
B. ampere-hours
C. watts
D. watt-hours
Electrolysis and Storage of Batteries
The output voltage of a charger is__________?
A. less than the battery voltage
B. higher than the battery voltage
C. the same as the battery voltage
D. none of the above
On the average the ampere-hour efficiency of an Edison cell is about__________?
A. 40%
B. 60%
C. 70%
D. 80%
The charge required to liberate one gram equivalent of any substance is known as _________ constant
A. time
B. Faraday’s
C. Boltzman
The active materials of a nickel-iron battery are___________?
A. nickel hydroxide
B. powdered iron and its oxide
C. 21% solution of KOH
D. all of the above
Which of the following battery is used for air-craft _____________?
A. Lead-acid battery
B. Nickel-iron battery
C. Dry cell battery
D. Silver oxide battery
In constant-current charging method, the supply voltage from discharged to fully charged condition____________?
A. decreases
B. increases
C. remains constant
D. none of the above
The body of Edison cell is made of___________?
A. bakelite
B. rubber
C. nickel plated steel
D. aluminium
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
Cells are connected in series in order to_____________?
A. increase the voltage rating
B. increase the current rating
C. increase the life of the cells
D. none of the above
