Under normal charging rate the charging current should be
10% of capacity
40% of capacity
30% of capacity
20% of capacity
10% of capacity
Satellite power requirement is provided through
solar cells
nickel-cadmium cells
dry cells
lead-acid batteries
solar cells
A constant-voltage generator has
high internal resistance
low internal resistance
minimum efficiency
minimum current capacity
low internal resistance
ampere-hour capacity would deliver a current of
6 amperes for 8 hours
48 amperes for 1 hour
24 amperes for 2 hours
8 amperes for 6 hours
6 amperes for 8 hours
Mercury cell has which of the following characteristics ?
Comparatively longer shelf life under adverse conditions of high temperature and humidity
High power to weight ratio
Flat discharge current-voltage curve
All of the above
All of the above
Which of the following factors adversely affects the capacity of the lead acid battery ?
Temperature of surroundings
Specific gravity of electrolyte
All of the above
Rate of discharge
All of the above
Internal resistance of a cell is reduced by
all above methods
putting plates very close together
increasing the plate area
using vent plug to permit gas formed during discharge
all above methods
Trickle charging of a storage battery helps to
keep it fresh and fully charged
increase its reserve capacity
maintain proper electrolyte level
prevent sulphation
keep it fresh and fully charged
It is noticed that durum charging
specific gravity of H2SO4 is increased
All above
there is a rise in voltage
energy is absorbed by the cell
All above
Which of the following cell has a. reversible chemical reaction ?
Lead-acid
Mercury oxide
Carbon-zinc
Silver-oxide
Lead-acid
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