In the circuit shown the readings of ammeter and voltmeter are $4\,\, A$ and $20\,\, V$ respectively. The meters are non ideal, then $R$ is
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Measured value of $R\, = \,\frac{V}{I} = \frac{{20}}{4}\, = 5\,\Omega $ But current in $R$ will actually be less than $I,$ so $R$ should be greater than $5\,\Omega $
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