A student measures the terminal potential difference `(V)` of a cell (of emf `epsilon` and internal resistance `r`) as a function of the current `(I)` flowing through it. The slope and intercept of the graph between `V` and `I`, then respectively, equal

Options

A. E and -r
B. `-r` and E
C. r and `-E`
D. `-E` and r

Answer

B

Explanation

`V = E-Ir rArr V = -r I + E`
Since, `Y = mx + c`
Slope `=-r`
Intercept = E