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  4. Find the equivalent resistance of the circuit between points A and B shown in figure (each branch is of resistance =1 Ω)

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Q. Find the equivalent resistance of the circuit between points $A$ and $B$ shown in figure (each branch is of resistance $=1 \Omega)$Physics Question Image

Current Electricity

Solution:

By perpendicular axis symmetry all points $1,2,3$ are at same potential, therefore junction on this line can be redrawn as $R_{A B}=\frac{22}{35} R$
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