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Class 11 Physics Practice Test: Mechanical Properties of Solids - Elastic Moduli
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Avg score: 59% • Most missed: “Which of the following quantities have the same S.I. unit as that of modulus of …”

Elastic modulus measures the resistance of the material to elastic—or “springy”—deformation.

Low modulus materials are floppy and stretch a lot when they are pulled (squash down a lot when pushed). High modulus materials are opposite—they stretch very little when pulled (squash down very little when pushed).

Class 11 Physics Practice Test: Mechanical Properties of Solids - Elastic Moduli
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10 Questions

1. A lake has a depth of 500m. The bulk modulus of water is 2*109N/m2. Calculate the fractional compression, ΔV/V, of water at the bottom of the lake.
2. A 10N force is uniformly distributed over the surface of a sphere of radius 20cm. The force at each point acts inward along the normal at that point. Find the fractional change in volume if the compressibility of the sphere is 10-11m2/N.
3. Which of the following represents volumetric strain?
4. Select the correct option. B is bulk modulus.
5. A small body having mass 1kg is rotating in a circle of radius 10cm. It is connected to the centre with the help of a string having young’s modulus = 1011N/m2. Find change in length of wire while the mass is rotating with constant speed of 2m/s. The cross sectional area of string is 1cm2.
6. Which of the following quantities have the same S.I. unit as that of modulus of elasticity?
7. The shear force applied has a magnitude of 1N. The box given below was initially a cube of 50cm side. Find the value of A *1010. Shear Modulus ‘G’ = 1010N/m2.
8. Bulk modulus is defined as -P / (ΔV/V). Therefore it can be negative. True or False?
9. Which of the following stresses causes change in density, as long as force acts on the body?
10. A wire has a cross sectional area ‘A’, length ‘L’ and young’s modulus ‘Y’. It is pulled by a force ‘F’ which causes a total extension of length ‘l’. The force F is so adjusted that the wire is only slowly stretched. Find the work done by the force in pulling the string by a length ‘dx’ when extension is x (0 > x > l).

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