A battery of e.m.f. E and internal resistance r is connected to a resistance R. Resistance R can be adjusted to any value greater than or equal to zero. A graph is plotted between the current passing through the resistance (I) and potential difference (V) across it. Select the correct alternatives.

Question

TestHub · Accepted Answer

Potential difference across resistance = Potential difference across the terminals of the battery.

So $V = E - I r$

This is an equation of a straight line. Comparing this with the given graph, we can see that $E = 10$ V and $r = 5Ω$ .

Also $I_{m a x} = \frac{E}{r} = \frac{10}{5} = 2 A$ when external resistance $R = 0$ .

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Options:(select one or more)

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