A Battery Has an Emf $\varepsilon = 43.0 \mathrm {~V}$ And an Internal Resistance

Multiple Choice

A battery has an emf $\varepsilon = 43.0 \mathrm {~V}$ and an internal resistance $r = 8.0 \Omega$ , as shown in the figure. When the terminal voltage $V _ { a b }$ is equal to $34.0 \mathrm {~V}$ , the current through the battery, including its direction, is closest to

A) $4.2 \mathrm {~A}$ , from $b$ to $a$ .
B) $1.1 \mathrm {~A}$ , from $b$ to $a$ .
C) $5.4 \mathrm {~A}$ , from $b$ to $a$ .
D) $1.1 \mathrm {~A}$ , from $a$ to $b$ .
E) $4.2 \mathrm {~A}$ , from $a$ to $b$ .