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  4. In the figure, potential difference between A and B is :

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Q. In the figure, potential difference between A and B is :Physics Question Image

JEE MainJEE Main 2020Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

$\frac{30-V_{A}}{10}+\frac{0-V_{A}}{10}+\frac{0-V_{A}}{10} = 0$
$3 = \frac{3V_{A}}{10}$
$V_{A} = 10\,V$

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