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

question 326

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 \(b\).

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