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A battery of e.m.f 2.1 V and internal resistance $0.05 \Omega$ is shunted for 5 seconds by a wire of constant resistance $ 0.02 \Omega$ , mass 1 g and specific heat $ 0.1 cal/g/^{\circ}C$ . The rise in the temperature of the wire is :

$\begin {array} {1 1} (1)\;10.7^{\circ}C & \quad (2)\;21.4^{\circ}C \\ (3)\;107^{\circ}C & \quad (4)\;214^{\circ}C \end {array}$

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Ans : (4)
$ 214^{\circ}C$
answered Feb 27, 2014 by thanvigandhi_1

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