Two batteries of emf ε1 and ε2 (ε2 > ε1) and internal resistances r1 and r2 respectively are connected in parallel as shown in the figure given.
1
The equivalent emf εeq of the two cells is between ε1 and ε2, i.e. ε1< εeq < ε2.
2
The equivalent emf εeq is smaller than ε1.
3
The εeq is given by εeq = ε1 + ε2 always.
4
εeq is independent of internal resistances r1 and r2.