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Class 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids Quiz 6 (25 MCQs)

Quiz Instructions

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1. Coefficient of kinetic friction is maximum when
2. What happens when the stress applied to the body is increased beyond the maximum value and is removed after some time?
3. The position vector of a particle is
4. The acceleration due to gravity is maximum at which location?
5. Hardness of thin hard sample is measured by
6. Which state of matter can be easily compressed (squashed)?
7. ..... is an example of elastomer
8. A wire can support a load Mg without breaking. It is cut into two equal parts. The maximum load that each part can support is
9. A uniform cable of length L is cut into two equal lengths of L/2 each. The maximum load that one of the wires can support is
10. The strain energy per unit volume is equal to .....
11. If S is stress and Y is young's modulus of material of a wire, the energy stored in the wire per unit volume is
12. Measures amount of stress that can be handled from pulling before breaking.
13. Explain the difference between elastic strain and plastic strain.
14. You push your finger into a ball of play-doh and it keeps its new shape. This is an example of
15. The cause of elasticity of a substance is
16. When a certain weight is suspended from a long uniform wire, its length increases by one cm. If the same weight is suspended from another wire of the same material and length but having a diameter half of the first one then the increase in length will be
17. The length of a uniform wire is increased by 1 mm on application of a given load. The extension produced when same load is applied in a uniform wire of the same material, but of length and radius twice that of the first is (in mm)
18. Two wires of the same length and material but different radii r$_{1}$ and r$_{2}$ are suspended from a rigid support both carry the same load at the lower end. The ratio of the stress developed in the second wire to that developed in the first wire is-
19. Tendency to crack or break before stretching much.
20. Acceleration due to gravity is ..... on the mass of the object.
21. Modulus of elasticity is the ratio of .....
22. When the weight of an object in contact with a surface is doubled, the value of the coefficient of static friction .....
23. Young's modulus is property of
24. What is the strain in a wire cable of original length 50 m whose length is increases by 2.5 cm when a load is lifted?
25. The graph of stress against strain is always
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