Current Electricity

Question: A cell of constant e.m.f. first connected to a resistance ${R_1}$ and then connected to a resistance ${R_2}$. If power delivered in both cases is then the internal resistance of the cell is

1) $\sqrt {{R_1}{R_2}} $

2) $\sqrt {\frac{{{R_1}}}{{{R_2}}}} $

3) $\frac{{{R_1} - {R_2}}}{2}$

4) $\frac{{{R_1} + {R_2}}}{2}$

Solution:

Explanation: No Explanation

Kirchhoff's Law Cells Internal Resistance

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