What is the equivalent resistance of the circuit

6 Ω

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7 Ω

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8 Ω

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9 Ω

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Solution

The correct option is D $8 Ω$
The voltmeter is assumed to have infinite resistance. and ammeter have zero resistance.
$R_{e q} = 2 + 4 + R_{p}$
where $R_{p} =$ parallel combination of two resistance of $2 Ω$
$R_{p} = 2 / 2 = 1 Ω$
Hence $R_{e q =} (1 + 2 + 1) + 4 = 8 Ω$

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