Four cells each of emf 2V and internal resistance 1ohm are connected in parallel with an external resistance of 6 ohm. The current in the external resistance is

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0.6 A

0.16 A

0.32 A

0.2 A

answer is A.

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Detailed Solution

Four cells are in parallel, effective internal resistance $= \frac{r}{n} = \frac{1}{4}$ effective emf E = 2V
$I = \frac{E_{eq}}{R + r_{eq}} = \frac{2}{6.25} = 0.32 A$

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