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Parallel Combination of Cells

A cell sends ...

Question

A cell sends current through a resistor R for time t. Now the same cell sends current through another resistor r for the same time. If same amount of heat is divided in both the resistance then the internal resistance of the cell is ?

A

\frac{R + r}{2}

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B

\frac{R - r}{2}

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C

\frac{R r}{2}

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D

\sqrt{R r}

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Solution

The correct option is D $\sqrt{R r}$

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