Negative plate of an Edison cell is made of__________?
Negative plate of an Edison cell is made of__________?
A. copper
B. lead
C. iron
D. silver oxide
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Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as________materials
Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as________materialsA. passive
B. active
C. redundant
D. inertAs compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its__________?
As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its__________?A. compactness
B. lower e.m.f.
C. small quantity of electrolyte used
D. higher internal resistanceWhich of the following cell has a. reversible chemical reaction ___________?
Which of the following cell has a. reversible chemical reaction ___________?A. Lead-acid
B. Mercury oxide
C. Carbon-zinc
D. Silver-oxideAs compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of___________?
As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of___________?A. reducing time of charging
B. increasing cell capacity
C. both (A) and (B)
D. avoiding excessive gassingFor a cell to work, which of the following condition(s) become necessary ___________?
For a cell to work, which of the following condition(s) become necessary ___________?A. Two electrodes of different meta’s should be inserted in the electrolyte, not touching each other
B. Electrolyte must chemically react with one of the electrodes
C. Electrolyte liquid or paste should be conducting
D. All above three conditions are necessaryMercury cell has which of the following characteristics ____________?
Mercury cell has which of the following characteristics ____________?A. Flat discharge current-voltage curve
B. High power to weight ratio
C. Comparatively longer shelf life under adverse conditions of high temperature and humidity
D. All of the above