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## Homework Statement

Please refer to the diagram(attachment).....the circuit contains two resistors in series of 25 and 15 ohm respectively and there are two batteries of emf 10 V and 5 V respectively ....Only thing missing in the diagram is that both the batteries have internal resistances of 2.5 V.....We need the PD between pts A and B.....

## Homework Equations

## The Attempt at a Solution

Current in the circuit comes out to be 1/9....now applying Kirchoff's Law i am getting PD to be -(5-5/9) i.e -4.44 but answer is -4 the approximation is huge so i wanted to confirm my answer....