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JEE Main2026Apr 5, Shift 1Physics
Q.

The Young's modulus of steel wire of radius and length is . If the radius and length of the wire are doubled then the value of

  1. A

    increases by two times

  2. B

    reduces by half

  3. C

    remains unchanged

  4. D

    becomes one fourth

Solution

Young's modulus is an intrinsic property of the material itself, defined as the ratio of stress to strain. It depends only on the composition and microstructure of the substance, not on the geometry of the specimen.

Changing radius and length affects measurable quantities like stiffness and extension, but remains the same for steel.

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