One of the cell is connected wrongly the equivalent emf and effective internal resistance of combination is

One of the cell is connected wrongly the equivalent emf and effective

1.	One of the cell is connected wrongly the equivalent emf and effective internal resistance of combination is
Answer» In series There arises 2 CASES: Identical cells. Non-identical cells In both cases NET INTERNAL resistance is the same. In the first case net emf will be 0 and in the second case net emf will be ( emf of CELL with greater emf)-(emf of cell with lesser emf) In parallel It is simply by the equation, Enet= (E1/r1+E2/r2.........En/rn)/(1/r1+1/r2.....1/rn) Net internal resistance will be the same when u connect them in parallel.