Physics

Problem

Two batteries are connected in a circuit. Battery

A

has EMF

E_{1} = 10\,\text{V}

and internal resistance

r_{1} = 1\,\Omega

. Battery

B

has EMF

E_{2} = 4\,\text{V}

and internal resistance

r_{2} = 2\,\Omega

. They are connected in opposition (positive to positive) with an external resistor

R = 3\,\Omega

completing the loop. Find the terminal potential difference across Battery

A