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JEE MAIN 2022
27-07-22 S1
Question
Two sources of equal emfs are connected in series. This combination is connected to an external resistance $R$. The internal resistances of the two sources are $r_1$ and $r_2\left(r_1>r_2\right)$. If the potential difference across the source of internal resistance $r_1$ is zero then the value of $R$ will be
Select the correct option:
A
$r_1-r_2$
B
$\frac{r_1 r_2}{r_1+r_2}$
C
$\frac{r_1+r_2}{2}$
D
$r_2-r_1$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
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Physics
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