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Class 11 Physics (Part Ii) Chapter 11 Mechanical Properties Of Solids Quiz 4 (25 MCQs)

Quiz Instructions

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1. A 2 m long rod of radius 1 cm which is fixed from one end is given a twist of 0.8 radians. The shear strain developed will be

Correct Answer: B) 0.004.

2. Which of these common fluids would have the highest viscosity?

Correct Answer: A) Honey.

3. Which of the following is a property of amorphous solids?

Correct Answer: D) Irregular arrangement of atoms.

4. Resistance to flow

Correct Answer: A) Viscosity.

5. What is the significance of the elastic limit in the context of the stress-strain curve?

Correct Answer: A) The elastic limit indicates the maximum stress that a material can withstand without permanent deformation.

6. Choose the correct dimensional formula for the universal gravitational constant G.

Correct Answer: A) $M^{-1}L^{3}T^{-2}$.

7. Which of the following is a disadvantage of friction?

Correct Answer: C) Production of heat in machines.

8. The spring balance does not read properly after its long use, because

Correct Answer: B) The elasticity decreases.

9. What is bulk modulus and how does it relate to volume change in materials?

Correct Answer: A) Bulk modulus is a measure of a material's resistance to volume change under pressure.

10. Elastic hysteresis is

Correct Answer: B) Lagging of strain behind stress.

11. Which of the following affects the elasticity of a substance?

Correct Answer: D) All of these.

12. Which property of solids is measured by the Mohs scale?

Correct Answer: B) Hardness.

13. The bulk modulus of a material of a wire 1m long is B. So the bulk modulus of a 2m long wire of same material will be

Correct Answer: B) B.

14. An block of 'X' kg mass is placed on a horizontal table. The force required to just move the block is 60 N.If the coefficient of static friction is 0.12, then the value of 'X' is ..... (take the value of acceleration due to gravity as $10\\frac{m}{s^2}$

Correct Answer: C) 50.

15. Young's modulus is maximum for

Correct Answer: D) Steel.

16. Which of the following solids is likely to have the highest melting point?

Correct Answer: B) Iron.

17. The ratio of linear stress to linear strain is called

Correct Answer: A) Young's modulus.

18. Which of the following solids is an example of a crystalline solid?

Correct Answer: C) Salt.

19. Compressibility is reciprocal of

Correct Answer: D) Bulk modulus.

20. Hardness is .....

Correct Answer: B) Ability to resist permanent deformation.

21. 1 N/m$^{2}$ = ..... dyne /cm$^{2}$

Correct Answer: D) 10.

22. Substances which can be stretched to cause permanent large strains are called:

Correct Answer: B) Ductile.

23. Young's modulus of a perfectly rigid body is

Correct Answer: C) Infinite.

24. Three resistors 20 $\Omega$, 30 $\Omega$, and 40 $\Omega$ are connected in series, and the combination is connected with 10 $\Omega$ resistance in parallel. Calculate the equivalent resistance.

Correct Answer: B) 9 $\Omega$.

25. There will be no volume change of the material if Poisson's ratio is

Correct Answer: C) 0.5.

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