Question

A student measures the terminal potential difference $\left(V\right)$ of a cell (of emf $\epsilon$ and internal resistance $r$) as a function of the current $\left(I\right)$ flowing through it. The slope and intercept of the graph between $V$ and $I$ are respectively equal to

• A. $\epsilon$ and $-r$
• B. $-r$ and $\epsilon$
• C. $r$ and $-\epsilon$
• D. $-\epsilon$ and $r$

Answer 1

The correct option is B $-r$ and $\epsilon$

$V=ϵ-Ir$