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Step 1:

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Find the voltage across the nodes A and B.

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The current flowing through the first loop :

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Apply KVL to the first loop.

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The current flowing through the second loop :

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Apply KVL to the second loop.

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Step 2:

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The voltage across the nodes A and B.

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The voltage across the nodes A and B is -3.7 V.

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Solution : \ \

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The voltage across the nodes A and B is -3.7 V.

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