Physics

Problem

Two batteries, one of emf

12\,\text{V}

(internal resistance

1\,\Omega

) and the other of emf

6\,\text{V}

(internal resistance

1\,\Omega

), are connected in series opposition to a

4\,\Omega

external resistor. Calculate the current in the circuit. a)

3.0\,\text{A}

1.5\,\text{A}

1.0\,\text{A}

1.2\,\text{A}