---

1. The dimensional formula of Young’s modulus is

A. ML⁻¹T⁻² B. ML²T⁻² C. M⁻¹L¹T² D. M⁻¹L⁻²T⁻²

---

2. The stress-strain curve for a material gives information about its

A. Strength B. Elasticity C. Plasticity D. All of these

---

3. If the length of a wire is doubled under the same load, its Young’s modulus

A. Doubles B. Halves C. Becomes four times D. Remains unchanged

---

4. A liquid rises in a capillary tube due to

A. Viscosity B. Gravity C. Surface tension D. Atmospheric pressure

---

5. The breaking stress of a material depends on its

A. Length B. Volume C. Density D. Material property

---

6. The ratio of stress to strain is called

A. Bulk modulus B. Young’s modulus C. Shear modulus D. Modulus of rigidity

---

7. A wire is stretched by a force. If the force is doubled, the elongation

A. Halves B. Remains the same C. Doubles D. Becomes four times

---

8. The surface tension of a liquid decreases with

A. Increase in temperature B. Decrease in temperature C. Increase in viscosity D. Decrease in density

---

9. Bemn rnoulli’s theorem is valid for

A. Compressible fluids B. Incompressible and non-viscous fluids C. Viscous fluids D. Fluids with variable density

---

10. The excess pressure inside a soap bubble is

A. 2T/r B. T/r C. 4T/r D. 4T/3r

---

11. The buoyant force on an object depends on

A. The weight of the object B. The density of the fluid and the volume displaced C. The volume of the object only D. The weight of the fluid displaced

---

12. The work done in stretching a wire is stored as

A. Potential energy B. Kinetic energy C. Thermal energy D. None of these

---

13. A hollow sphere of radius R and a solid sphere of radius R are made of the same material. Their bulk modulus will be

A. Greater for hollow sphere B. Greater for solid sphere C. Same for both D. Depends on density

---

14. The viscosity of a liquid

A. Increases with temperature B. Decreases with temperature C. Remains constant with temperature D. Depends on pressure only

---

15. A drop of liquid assumes a spherical shape due to

A. Viscosity B. Surface tension C. Density D. Pressure

---

16. The critical velocity of a fluid in a pipe depends on

A. Density and viscosity of the fluid B. Diameter of the pipe only C. Length of the pipe D. Temperature of the fluid

---

17. The height to which a liquid rises in a capillary tube is

A. Directly proportional to the radius B. Inversely proportional to the radius C. Independent of the radius D. Proportional to the square of the radius

---

18. The terminal velocity of a falling sphere in a viscous fluid depends on

A. Radius of the sphere and viscosity of the fluid B. Radius of the sphere only C. Density of the fluid only D. Viscosity of the fluid only

---

19. The modulus of rigidity is defined as the ratio of

A. Stress to strain in a body under compressive stress B. Shear stress to shear strain C. Tensile stress to tensile strain D. Bulk stress to bulk strain

---

20. The elasticity of a material is due to

A. Strain B. Stress C. Deformation D. Intermolecular forces