Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as________materials

A. using vent plug to permit gas formed during discharge
B. increasing the plate area
C. putting plates very close together
D. all above methods

A. positive active material
B. negative active material
C. passive material
D. none of the above

A. two rate charge control
B. trickle charge
C. floating charge
D. an equalizing charge

A. 0.8
B. 0.9
C. 1.0187
D. 1.5

A. they have same e.m.f.
B. they have same make
C. they have same ampere-hour capacity
D. they have identical internal resistance

A. capacity of the cell is reduced
B. life of the cell is reduced
C. open plates are converted to lead sulphate
D. all above