In order to reduce its diameter, a wire is pulled through a small hole in a metal plate. The wire is made of metal whose specific heat capacity is $400 J / k g^{\circ} C$ and on entering from the hole, has a mass per unit length of $5 g$ per meter. A steady force of $600 N$ is required to pull the wire. If all the heat generated is retained in the wire, the rise in temperature of the wire if it is pulled slowly is $50 N^{\circ} C$ . Where N is

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Detailed Solution

$600 l = λ l S Δ T Δ T = \frac{600}{λ S} Δ T = \frac{600}{400 \times 5 \times 10^{- 3}} Δ T = \frac{3}{10} \times 10^{3} Δ T = 300 K$

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