Question

why grouping of cells is necessary...​

Answer 1

Answer:

A limited amount of current can be drawn from a single cell or battery. There are situations where single cell fails to meet the current requirement in a circuits. To overcome the problem cells can be grouped in series and in parallel combinations or mixed grouping of cells is done in order to obtain a large value.

Answer 2

A limited amount of current can be drawn from a single cell or battery. There are situations where single cell fails to meet the current requirement in a circuits. To overcome the problem cells can be grouped in series and in parallel combinations or mixed grouping of cells is done in order to obtain a large value.

Cells can be grouped into series, parallel and mixed grouping. The maximum current is obtained in a series combination of cells when the external resistance R is very high as compared to the total internal resistance of the battery, nr.