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Question

In the network shown in Figure, the potential difference across $A$ and $B$ is

$2 V$
$z e r o$
$4 V$
$6 V$

A

6 V

B

2 V

C

4 V

D

z e r o

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Solution

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By symmetry, we see that the current in the left and right arms should be the same. It means no current should flow from $A$ to $B$ .

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