Q.1:
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
Q.2:
During charging the specific gravity of the electrolyte of a lead-acid batteryN
A.increases
B.
decreases
C.
remains the same
D.
becomes zero
Q.3:
The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity. The statement is associated with____________?
A.
Newtons law
B.
Faradays law of electromagnetic"
C.Faradays law of electrolysis
D.
Gausss law
Q.4:
When a lead-acid battery is in fully charged condition, the color of its positive plate is__________?e
A.
dark grey
B.
brown
C.dark brown
D.
none of above
Q.5:
The charge required to liberate one gram equivalent of any substance is known as _________ constantc
A.
time
B.Faradays
C.
Boltzman
D.
Q.6:
The capacity of a lead-acid cell does not depend on its___________?C
A.
temperature
B.rate of charge
C.
rate of discharge
D.
quantity of active material
Q.7:
The active materials on the positive and negative plates of a fully charged lead-acid battery are_______?i
A.
lead and lead peroxide
B.
lead sulphate and lead
C.lead peroxide and lead
D.
none of the above
Q.8:
During the charging of a lead-acid cell__________?2
A.its voltage increases
B.
it gives out energy
C.
its cathode becomes dark chocolate brown in colour2
D.
specific gravity of H2SO4 decreases#
Q.9:
The storage battery generally used in electric power station is__________?J
A.
nickel-cadmium battery
B.
zinc-carbon battery
C.lead-acid battery
D.
none of the above
Q.10:
The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is____________?_