Question 658: Current Electricity

Question

A student measures the terminal potential difference (V) of a cell (of emf $\varepsilon $ 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

Accepted Answer

The terminal potential difference of a cell is given by V + Ir = $\varepsilon $
V = V
A
Ã¢ÂÂ V
B
$ \Rightarrow $  V = $\varepsilon $ Ã¢ÂÂ Ir
$ \Rightarrow {{dV} \over {dI}} =  - r$,  Also for,  i = 0 then V = $\varepsilon $
$ 	herefore $ slope = Ã¢ÂÂ r, intercept = $\varepsilon $

Answer

$-$ r and $\varepsilon $

Answer

r and $-$ $\varepsilon $

Answer

$-$ $\varepsilon $ and r

Answer

$\varepsilon $ and $-$ r

Current Electricity

A student measures the terminal potential difference (V) of a cell (of emf \varepsilon 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

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