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A steel wire of mass 3.16Kg is stretched...

A steel wire of mass 3.16Kg is stretched to a tensile strain of `1xx10^(-3)` . The elastic deformation energy if density `rho=`7.9g/cc and `Y=2 xx 10^11N//m^2`

A

4KJ

B

0.4KJ

C

0.04KJ

D

4J

Text Solution

Verified by Experts

The correct Answer is:
C
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A wire of density 9 xx 10^(3) kg//m^(3) is stretched between two clamps l m apart and is subjected to an extension of 4.9 xx 10^(-4) m . What will be the lowest frequency of transverse vibrations in the wire ? (Y=9xx10^(10)N//m^(2)) .

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A copper wire and a steel wire of radii in the ratio 1:2, lengths in the ratio 2:1 are stretched by the same force. If the Young's modulus of copper = 1.1 xx 10^11Nm^(-2) find the ratio of their extensions (young's modulus of steel = 2 xx 10^11 N//m^2) .

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