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  4. The potential difference between A and B in the following circuit is <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-9jybbowpdzl0.png />

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Q. The potential difference between $A$ and $B$ in the following circuit is

Question

NTA AbhyasNTA Abhyas 2020Current Electricity

Solution:

Solution
Applying Kirchhoff's voltage law,
$I\left(2 + 8\right)=6+4$
$I.10=10$
$I=1 \, A$
$V_{A}-\left(I \times 2\right)+6=V_{B}$
$V_{A}-V_{B}=\left(1 \times 2\right)-6$
And $V_{B A}=4 \, V$