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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A uniform cylindrical wire is subjected to a longitudinal tensile stress of 5 × 10 ^ 7 N/m 2 . Young’s modulus of the material of the wire is 2 × 10 ^ 11 N/m 2 . The volume change in the wire is 0.02 %. The fractional change in the radius is

A uniform cylindrical wire is subjected to a longitudinal tensile stress of 5 × 10 ^ 7 N/m 2 . Young’s modulus of the material of the wire is 2 × 10 ^ 11 N/m 2 . The volume change in the wire is 0.02 %. The fractional change in the radius is

A steel wire is suspended vertically from a rigid support. When loaded with a weight in air it expands by and when the weight is immersed completely in water the extension is reduced to 14 cm . Then relative done of the material of weight is