Question

when the external resistance is very small then the cells must be connected in series in the combination of cells so that the current becomes maximum yes or no

Answer 1

No, when external resistance is small the cells must be connected in parallel.

We know, I = (nE)/(r + nR) {for parallel}

Therefore if R(external resistance) is zero then current will be very high for parallel combination since ‘r’ is always very small...