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Cross sectional area of a steel wire is `1 cm^2`.How much force is required to increase its length to twice its initial length? Young's modulus for steel is `2 times 10^12 dyn.cm^-2`.

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The correct Answer is:
`2 times 10^12 dyn`
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CHHAYA PUBLICATION-ELASTICITY -EXERCISE ( Problem Set-I)
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  13. The value of Young's modulus for a material is 24 times 10^11 dyn.cm^-...

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  17. When a load of 20 kg is hung from a wire of cross sectional area 1mm^2...

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  20. A wire of length L and cross sectional area a is stretched by l, where...

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