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Step 1 :

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Resistors R₅ and R₆ are in parallel.

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Find the equivalent parallel resistance.

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Redraw the network replacing equivalent parallel resistance.

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Convert the delta network into star.

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Step 2 :

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Redraw the network with star connection.

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Resistors R_C and R_B are in parallel.

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Now the resistor R_A is in series with R_p.

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Resistors R_q and R₁ are in parallel.

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Step 3 :

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Redraw the equivalent network.

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Apply the KVL to the equivalent network.

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Step 4 :

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Find the voltage across the nodes A and B.

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Voltage acroos the node s A and B is .

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Solution :

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Voltage acroos the node s A and B is .

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