Question
$V(R)$, of a battery is given by$$V(R)=\frac{E R}{R+r}$$where $r$ is the internal resistance and $E$ is the electromotive force. Find $V(r)$ and $V(2 r)$.
Step 1
To do this, we simply plug in R = r into the equation: V(r) = E * r / (r + r) = E * r / (2r) Now, we can simplify the equation by canceling out the r terms: V(r) = E / 2 Show more…
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