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1. The dimensional formula of viscosity is

A. ML⁻¹T⁻² B. ML⁻¹T⁻¹ C. MLT⁻² D. ML²T⁻³

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2. A capillary tube is dipped in a liquid, and the liquid rises to height h. If the radius of the tube is doubled, the height of the liquid will be

A. h B. 2h C. h/2 D. h/4

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3. The bulk modulus of a fluid is defined as

A. Stress × strain B. Stress/strain C. Pressure × volume D. Volume/pressure

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4. The SI unit of modulus of rigidity is

A. Joule B. Newton C. Pascal D. Newton per meter

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5. The work done in stretching a wire is proportional to

A. Stress B. Strain C. Stress × strain D. 1/2 × stress × strain

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6. If the stress applied to a wire is doubled, its elongation will

A. Double B. Halve C. Remain the same D. Become four times

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7. Surface tension of a liquid depends on

A. Its volume B. Its density C. The nature of the liquid D. Its viscosity

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8. The rise of a liquid in a capillary tube is due to

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

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9. The velocity of efflux of a liquid through a small hole is given by

A. Bernoulli’s principle B. Archimedes’ principle C. Torricelli’s theorem D. Stokes’ law

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10. The terminal velocity of a sphere falling through a viscous liquid depends on

A. The radius of the sphere and the density of the fluid B. The density of the fluid only C. The radius of the sphere only D. The velocity of the sphere only

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11. The excess pressure inside a soap bubble is

A. 2T/r B. 4T/r C. 8T/r D. T/r

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12. The angle of contact for pure water and glass is

A. Acute B. Obtuse C. Zero D. 90 degrees

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13. The elasticity of a material is measured by

A. Its stress B. Its strain C. The ratio of stress to strain D. The product of stress and strain

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14. The modulus of rigidity of a material is relevant for

A. Volume deformation B. Shear deformation C. Tensile deformation D. None of these

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15. The velocity of flow of a liquid through a pipe is maximum

A. Near the walls of the pipe B. At the center of the pipe C. Uniform throughout the pipe D. At the ends of the pipe

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16. The surface energy of a liquid drop depends on

A. Its radius B. Its volume C. Its surface area D. Its density

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17. The rise or fall of a liquid in a capillary tube is directly proportional to

A. Surface tension B. Viscosity C. Density of the liquid D. Volume of the liquid

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18. The terminal velocity of a body moving through a viscous fluid is given by Stokes’ law. It is proportional to

A. Radius of the body B. Radius squared of the body C. Density of the fluid D. Volume of the body

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19. The buoyant force on a submerged object depends on

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

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20. The factor responsible for the spherical shape of liquid droplets is

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