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A steet wire of length 4.7 m and cross -...

A steet wire of length 4.7 m and cross - sectional area `3.0xx10^(-5)m^(2)` stretches by the same amount as a copper wire of length 3.5 m and cross- sectional area of `4.0xx10^(-5)m^(2)` under a given load. What is the ratio of the Young's modulus of steel to that of copper ?

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The correct Answer is:
1.8
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A steel wire of length 4.7 m and cross-sectional area 3.0 xx 10 ^(-5) m ^(2) stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 xx 10 ^(-5) m ^(2) under a given load. What is the ratio of the Young's modulus of steel to that of copper ?

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Knowledge Check

  • The resistance of 300 m long wire with cross-sectional area 10^(-6)m^2 and resistivity 10^(-7) Omegam is …………… .

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    `30 Omega`
    B
    `3 Omega`
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    `0.3 Omega`
    D
    `300 Omega`

  • The adjacent graph shows the extension (DeltaI) of a wire of length 1 m suspended from the top of a roof at one end with a load W connected to the other end. If the cross-sectional area of the wire is 10^(-6) m ^(2), calculate The Young's modulus of the material of the wire is ........

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