A dead storage battery can be revived by
a dose of H2SO4
none of the above
adding distilled water
adding so-called battery restorer
none of the above
As compared to a lead-acid cell the efficiency of a nickel-iron cell is less due to its
higher internal resistance
compactness
lower e.m.f.
small quantity of electrolyte used
higher internal resistance
The specific gravity of electrolyte is measured by
psychrometer
a mechanical gauge
manometer
hydrometer
hydrometer
Over charging
produces excessive gassing
loosens the active material
all above
increases the temperature resulting in buckling of plates
all above
Undercharging
reduces specific gravity of the electrolyte
increases the temperature
produces excessive gassing
increases specific gravity of the electrolyte
reduces specific gravity of the electrolyte
“The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity”. The above statement is associated with
Faraday’s law of electrolysis
Faraday’s law of electromagnetic
Newton’s law
Gauss’s law
Faraday’s law of electrolysis
The charge required to liberate one gram equivalent of any substance is known as ______ constant
none of above
Faraday’s
time
Boltzmann
Faraday’s
When a lead-acid battery is in fully charged condition the color of its positive plate is
dark brown
dark grey
brown
none of above
dark brown
The active materials of a nickel-iron battery are
21% solution of KOH
powdered iron and its oxide
nickel hydroxide
all of the above
all of the above
The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is
just one
always less than one
always greater than one
none of the above.
always greater than one
पोस्ट अच्छी लगी हो तो प्लीज नीचे दिए गए लिंक पर क्लिक कर शेयर जरुर करें
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