copper
lead
iron
silver oxide
Answer is Right!
Answer is Wrong!
Detailed SolutionNegative plate of an Edison cell is made of
Electrolysis and storage of batteries
22. In constant-current charging method, the supply voltage from discharged to fully charged condition
decreases
increases
remains constant
none of the above
Answer is Right!
Answer is Wrong!
23. The capacity of a lead-acid cell does not depend on its
temperature
rate of charge
rate of discharge
quantity of active material
Answer is Right!
Answer is Wrong!
Detailed SolutionThe capacity of a lead-acid cell does not depend on its
24. Persons preparing electrolyte should wear
goggles or other face shield
rubber
rubber boots and gloves
all above safety devices
Answer is Right!
Answer is Wrong!
25. On the average the ampere-hour efficiency of an Edison cell is about
40%
60%
70%
80%
Answer is Right!
Answer is Wrong!
Detailed SolutionOn the average the ampere-hour efficiency of an Edison cell is about
26. The internal resistance of a lead-acid cell is that of Edison cell
Less than
More than
Equal to
None of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionThe internal resistance of a lead-acid cell is that of Edison cell
27. Following will happen if the specific gravity of electrolyte becomes more than 1.23.
Loss of capacity
Loss of life
Corrosion of the grids of the plate
All above
Answer is Right!
Answer is Wrong!
28. Undercharging
Reduces specific gravity of the electrolyte
Increases specific gravity of the electrolyte
Produces excessive gassing
Increases the temperature
Answer is Right!
Answer is Wrong!
29. Sulphated cells are indicated by
the loss of capacity of the cell
the decrease of the specific gravity
the low voltage of the cell on discharge
all above conditions
Answer is Right!
Answer is Wrong!
30. The internal resistance of an alkali cell is nearly _____ times that of the lead-acid cell.
two
three
four
five
Answer is Right!
Answer is Wrong!