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In the circuit shown in figure, the ammeter shows 5 A current, voltmeter shows 250 v and the internal resistance of the voltmeter is 2500 $ \Omega$ then the value of R is :

$\begin {array} {1 1} (1)\;150\: \Omega & \quad (2)\;0.51\: \Omega \\ (3)\;510\: \Omega & \quad (4)\;51\: \Omega \end {array}$

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(4) $ 51\:  \Omega$
answered Nov 7, 2013 by pady_1

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