TS EAMCET 2017 Code A Solved Paper

The equivalent emf of the combination is calculated as shownbelow,
Eeq=nE
=3‌times‌20
=60
Here, the cell has no internal resistance.
Therefore, the main current flowing through the load is given by
i=‌‌

nE

R

=‌‌

60

4

=15A