Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R 1 and R 2 ( R 2 R 1 ) . If the potential difference across the source hav

Question

Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are $R_{1}$ and $R_{2} (R_{2} > R_{1})$ . If the potential difference across the source having internal resistance $R_{2}$ is zero, then

Options:

Answer:

B

Solution:

$I = \frac{2 E}{R _{1} + R _{2} + R}$ $E - R_{2} I = 0$ $\Rightarrow R = R_{2} - R_{1}$

TestHub · Accepted Answer

I = R 1 ​ + R 2 ​ + R 2 E ​ E − R 2 ​ I = 0 ⇒ R = R 2 ​ − R 1 ​

Physics - Current Electricity Question with Solution | TestHub

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