Q.1
The dimensions of viscosity in terms of M,L,T is ?
  • $MLT^{-1}$
  • $M^{-1}LT^{-1}$
  • $ML^{-1}T^{-2}$
  • $ML^{-1}T^{-1}$
Q.2
A man is sitting in a boat which is floating on a pond. The man drinks some water from pond. What happens to the water level in the pond? The water level will
  • Rises
  • falls
  • remains same
  • Not enough information
Q.3
A body floats in water with 40% of its volume outside water.When the same body floats in some liquid,60% of its volume remains outside the liquid. The relative density of the liquid is
  • 1.5
  • 1.2
  • .6
  • None of these
Q.4
A closed compartment containing gas is moving with some acceleration in horizontal direction. Then the pressure in the compartment is? Neglect the effect of gravity
  • lower in the front side
  • same everywhere
  • lower in the rear side
  • Not enough information
Q.5
A object of relative density 10 is released from rest on the surface of a lake.if the viscous effect are ignored ,the object sinks in the water with an acceleration ?
  • 10g
  • 9g/10
  • 11g/10
  • None of these
Q.6
Machine parts are jammed in winter due to
  • Increase in surface tension of lubricant
  • Decrease in viscosity of lubricant
  • Decrease in surface tension of lubricant
  • increase in viscosity of lubricant
Q.7
A horizontal pipeline carries water in a stream line flow? At point A along the pipe,the cross-sectional area is 10 cm2,the water velocity is 1 m/s and pressure is 2000 Pa.What is the pressure at point B where cross-sectional area is 5.0 cm2
  • 500 Pa
  • 400 Pa
  • 300 Pa
  • None of the above
Q.8
A big drop of water is broken into large number of small drops? The surface energy would
  • Remains unchanged
  • will increase
  • will decrease
  • Not enough information
Q.9
A U tube containing a liquid is accelerated horizontally with constant acceleration a .The separation between the limb's is L. The Difference in the height of the liquid in the two arms would be
  • $L \sqrt { \frac {a}{g}}$
  • $\frac {aL}{g}$
  • $ \frac {L}{2}$
  • $\frac {a^2L}{g^2}$
Q.10
A block of wood has a mass 25 g. When a 5 g metal piece with a volume 2 cm3 is attached to the bottom of the block,the wood barely floats in water what is the volume of the V of the wood
  • $20 cm^3$
  • $38 cm^3$
  • $28 cm^3$
  • None of these
Q.11
A solid sphere of radius R,made up of a material of bulk modulus K is surrounded by a liquid in a cylindrical container. A mass-less piston of area A floats on the surface of the liquid.When a mass M is placed on the piston to compress the liquid,the fractional change in the radius of the sphere is
  • $ \frac {Mg}{2AK}$
  • $ \frac {3Mg}{AK}$
  • $ \frac {Mg}{3AK}$
  • $ \frac {Mg}{AK}$
Q.12
A small hole is there near the bottom of the water filled container. The speed of the water ejected depends on
  • Density of the liquid
  • acceleration due to gravity
  • height of the liquid above the hole
  • All of the above
Q.13
if the hollow bob of a simple pendulum be filled with mercury that drains out slowly,its time period
  • increases continuously
  • decreases continuously
  • remains same
  • first increases and then decreases
Q.14
Water leaves a faucet with a downward velocity of 3 m/s. As the water falls below the faucet,it accelerates with acceleration g. The cross-section area of the water stream leaving the faucet is 1.0 cmWhat is the cross-sectional area of the stream .5 m below the faucet?
  • .50 cm2
  • .9 cm2
  • .1 cm2
  • .69 cm2
Q.15
Water rises to a height of 13.6 cm in a capillary tube dipped in water.When the same tube is dipped in mercury ,it is depressed by $3 \sqrt {2}$ cm. The angle of contact in water is 0°. The angle of contact in mercury =135° Given : Relative density of mercury =13.6 Find out the ratio of the surface tensions of mercury and water
  • 6
  • 5
  • 11
  • None of these
0 h : 0 m : 1 s