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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

A copper wire 2 m long is stretched by 1 mm. If the energy stored in the stretched wire is converted into heat, calculate the rise in temperature of the wire. (Given , density of copper and specific heat of copper )

Answer: (B)

Solution

Energy stored per unit volume converts to heat: , where strain (10^{-1}$\ cm)/(200\

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Question ID VK-154976