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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

Two wires of equal cross-section but one made of steel and the other of copper are joined end to end. When the combination is kept under tension, the elongations in the two wires are found to be equal. What is the ratio of the lengths of the two wires? (Given: , )

Answer: (C)

Solution

Equal cross-section and same force (series combination) give equal elongation when

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Question ID VK-154979