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Class 11 Physics: Mechanical Properties of Solids
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MCQs on solids elastic behaviour, stress and strain mechanical properties, hookes law, stress-strain curve, elastic moduli and materials elastic behaviour.

Class 11 Physics: Mechanical Properties of Solids
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25 Questions

1. The stress corresponding to fracture point is called ______
2. Select the correct option. B is bulk modulus.
3. Which of the following quantities have the same S.I. unit as that of modulus of elasticity?
4. A wire has a young's modulus of 105N/m2, length 1m & radius 3mm. Assuming a uniform cross sectional area, find the radius of wire after it is under a force of 1N from both ends.
5. A material have a stress strain curve which can look similar to the equation y = x2 (for all x>0). True or False?
6. Hooke's law is an empirical law. True or False?
7. A wire has a young's modulus of 105N/m2, length 1m & radius 3mm. Assuming a uniform cross sectional area, find the radius of wire after it is under a force of 1N from both ends.
8. A wire with a radius of 5mm is hung freely from the ceiling. A load of 5N is applied to its free end. Find the elongation in the wire if its volume is 7.85*10-5m3 & young's modulus is 1011N/m2.
9. Which of the following quantities have the same S.I. unit as that of modulus of elasticity?
10. A material have a stress strain curve which can look similar to the equation y = x2 (for all x>0). True or False?
11. A wire with a radius of 5mm is hung freely from the ceiling. A load of 5N is applied to its free end. Find the elongation in the wire if its volume is 7.85*10-5m3 & young's modulus is 1011N/m2.
12. Which of the following options is correct?
13. Which of the following statements is correct for brittle materials.
14. 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.

15. What does the area under the stress-strain curve represent?
16. The forces responsible for a body regaining its shape after removal of deforming forces are ________
17. 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.
18. A completely elastic solid body partially regains its shape after removal of external force. True or False?
19. The stress corresponding to fracture point is called ______
20. 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).
21. 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.
22. 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.

23. Which of the following statements is correct for ductile materials.
24. 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.
25. 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.

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