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JEE Main 12 Apr 2019 Paper 2 Solved Paper

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Question : 13

Total: 90

A uniform cylindrical rod of length L and radius r, is made from a material whose Young’s modulus of Elasticity equal Y. When this rod is heated by temperature T and simultaneously subjected to a net longitudinal compressional force F, its length remains unchanged. The co-efficient of volume expansion, of the material of the rod, is (nearly) equal to:

F
(3πr2YT )
R
2
6F
(πr2YT )
9F
(πr2YT )
3F
(πr2YT )

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