In the electric network shown, when no current flows through the \[4\Omega \]resistor in the arm EB, the potential difference between the points A and D will be : [JEE MAIN 11-04-2015] |
A) 3V
B) 4V
C) 5V
D) 6V
Correct Answer: C
Solution :
[c] |
If current in \[4\Omega \] is zero then \[\underset{BCDE}{\mathop{{{\varepsilon }_{v}}}}\,=0\] |
\[{{V}_{EB}}+{{V}_{BC}}+{{V}_{CD}}+{{V}_{DE}}=0\] |
\[-4+3+{{V}_{CD}}+0=0\] |
\[{{V}_{CD}}=1\]volt |
again \[{{V}_{A}}-9+3+1-{{V}_{D}}=0\] |
\[{{V}_{A}}-{{V}_{D}}=5V\]EXAM |
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