Two batteries

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

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}

(b)

1.5\,\text{A}

(c)

1.0\,\text{A}

(d)

1.2\,\text{A}

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