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A 5 m long aluminium wire (Y=7xx10^10(N)...

A 5 m long aluminium wire `(Y=7xx10^10(N)/(m^2))` of diameter 3 mm supprts a 40 kg mass. In order to have the same elongation in a copper wire `(Y=12xx10^10(N)/(m^2))` of the same length under the same weight, the diameter should now, in mm

A

1.75

B

1.5

C

2.3

D

5

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AAKASH INSTITUTE-MECHANICAL PROPERTIES OF SOLIDS-Assignment(Section-C)
  1. The increase in pressure required to decrease the 200 L volume of a li...

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  2. Which of the following relations is true?

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  3. A 5 m long aluminium wire (Y=7xx10^10(N)/(m^2)) of diameter 3 mm suppr...

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  4. Two steel wires of the same radius have their lengths in the ratio of ...

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  5. A steal wire of cross-section area 3xx10^(-6) m^(2) can withstand a m...

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  6. The bulk modulus for an incompresssible liquid is

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  7. A copper rod length L and radius r is suspended from the ceiling by on...

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  8. Which of the folliwing substances has the highest elastictiy

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  9. When a wire of length 10 m is subjected to a force of 100 N along its ...

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  10. Two wire A and B of length l, radius r and length 2l, radius 2r having...

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  11. A cube of side 40 cm has its upper face displaced by 0.1 mm by a tange...

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  12. A rod of length l and radius r is joined to a rod of length l//2 and r...

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  13. The Young's modulus of the meterial of a wire is 2xx10^(10) N m^(-2) I...

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  14. A weight is suspended from a long metal wire. If the wire suddenly bre...

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  15. A wire of natural length l, young's modulus Y and ares of cross-sectio...

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  16. When a force is applied on a wire of uniform cross-sectional area 3xx1...

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  17. If in a wire of Young's moduls Y, longitudinal strain X is produced th...

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  18. A uniform metal rod of 2mm^(2) area of cross section is heated from 0^...

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  19. A material has Poisson's ratio 0.5, If a uniform rod of it suffers a ...

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  20. When the length of a wire is increased by 5%, its radius decreases by ...

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