why should bases be used as electrolytes?why are alkali batteries used?
what is a lead accumulator?
what is internal resistance and why is high in primary cells and less in secondary cells?
how and why does current move in the opposite direction of the flow of electrons?
Are the phrases "rate of flow of electron " and "rate of flow of charge " the same thing?

Asked by Protyusha | 16th Oct, 2016, 10:03: PM

Expert Answer:

(a) There is no preference over acids or bases as electrolytes.
 
Water soluble bases that mean alkalis can dissociate to produce ions. These ions are responsible for the flow of current. Chemically, a typical alkaline dry cell battery has a zinc anode and a manganese dioxide cathode. The electrolyte is a non-acidic basic paste which is mostly potassium hydroxide.
 
(b) Generally, alkaline batteries are preferred as it has a slight performance edge over a non-alkaline battery like lithium battery. These batteries are the most suitable for applications where the current being used is normally low, like in devices that do not require a lot of power during their use or are used periodically, like remote controls or radios.
They have longer shelf life and are rechargeable hundreds of times if recharging is done after the battery has been used to 25 percent of its capacity or less.
Electronic devices that carry a label stating "Use alkaline batteries only" are typically warranted under conditions where a quick, high-current draw is needed from a battery. 
 
NOTE: Kindly ask other/non-connected questions as separate queries.

Answered by Romal Bhansali | 17th Oct, 2016, 02:23: PM