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  • In the circuit shown, each resistance is 2 ohm. The potential  as indicated in the circuit is equal to (please give yo

In the circuit shown, each resistance is 2 ohm. The potential V_1 as indicated in the circuit is equal to (please give your answer in Volt (V))

Option: 1

-9


Option: 2

-11


Option: 3

9


Option: 4

11


Answers (1)

best_answer

Given: \mathrm{R}=2 \Omega

Equivalent resistance between A and B

\quad \mathrm{R}_{\mathrm{AB}}=\mathrm{R} \| \mathrm{R}=\frac{\mathrm{R}}{2}=1 \Omega

Current through the circuit I=\frac{12-5}{(2+2+2+1)}=1 \mathrm{~A}


\begin{aligned} &\mathrm{V}_{1}-\mathrm{V}_{\mathrm{A}}+\mathrm{I}(2+2)+5=0 \\ &\therefore \mathrm{V}_{1}-0=-4-5 \quad\left(\mathrm{~V}_{\mathrm{A}}=0\right) \end{aligned}

 

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