An energy source will supply a constant current into the load if its internal resistance is (a) very large as compared to the load resistance (b) equal to the resistance of the load (c) non-zero but less than the resistance of the load (d) zero

Answer: (a). I = (E)/(R + r) If r R, then I ≈ E/r, independent of the load R, so the current stays nearly constant. So the answer is (a) very large compared to the load resistance.

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Cells: EMF, Internal Resistance & Combinations

An energy source will supply a constant current into the load if its internal resistance is

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Answer: (a)

$I = \frac{E}{R + r}$
If $r \gg R$ , then $I \approx \frac{E}{r}$ , independent of the load $R$ , so the current stays nearly constant.
So the answer is (a) very large compared to the load resistance.

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