Physics-
General
Easy
Question
A cubical block of side 'a' and density '
' slides over a fixed inclined plane with constant velocity 'v'. There is a thin film of viscous fluid of thickness 't' between the plane and the block. Then the coefficient of viscosity of the thin film will be:
- None of these
The correct answer is:
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A space 2.5 cm wide between two large plane surfaces is filled with oil. Force required to drag a very thin plate of area 0.5 
just midway the surfaces at a speed of 0.5 m/s is 1N. The coefficient of viscosity in kg–sec/ is:
A space 2.5 cm wide between two large plane surfaces is filled with oil. Force required to drag a very thin plate of area 0.5 just midway the surfaces at a speed of 0.5 m/s is 1N. The coefficient of viscosity in kg–sec/ is:
physics-General
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An open pan P filled with water (density 
) is placed on a vertical rod, maintaining equilibrium. A block of density is placed on one side of the pan as shown. Water depth is more than height of the block.
An open pan P filled with water (density ) is placed on a vertical rod, maintaining equilibrium. A block of density is placed on one side of the pan as shown. Water depth is more than height of the block.
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A small ball is left in a viscous liquid form very much height. Correct graph of its velocity with time is :–
A small ball is left in a viscous liquid form very much height. Correct graph of its velocity with time is :–
physics-General
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A homogeneous solid cylinder of length L (L < H/2), cross–sectional area A/5 is immersed such that it floats with its axis vertical at the liquid–liquid interface with length L/4 in the denser liquid as shown in the figure. The lower density liquid is open to atmosphere having pressure 
. Then, density D of solid is given by :–
A homogeneous solid cylinder of length L (L < H/2), cross–sectional area A/5 is immersed such that it floats with its axis vertical at the liquid–liquid interface with length L/4 in the denser liquid as shown in the figure. The lower density liquid is open to atmosphere having pressure . Then, density D of solid is given by :–
physics-General
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A mercury manometer is connected as shown in the figure. The difference in height 
is : (symbols have usual meaning).
A mercury manometer is connected as shown in the figure. The difference in height is : (symbols have usual meaning).
physics-General
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There are two identical small holes on the opposite sides of a tank containing a liquid. The tank is open at the top. The difference in height between the two holes is h. As the liquid comes out of the two holes, the tank will experience a net horizontal force proportional to–
There are two identical small holes on the opposite sides of a tank containing a liquid. The tank is open at the top. The difference in height between the two holes is h. As the liquid comes out of the two holes, the tank will experience a net horizontal force proportional to–
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The U–tube shown has a uniform cross–section. A liquid is filled in the two arms up to heights 
and 
, and then the liquid is allowed to move. Neglect viscosity and surface tension. When the levels equalize in the two arms, the liquid will–
The U–tube shown has a uniform cross–section. A liquid is filled in the two arms up to heights and , and then the liquid is allowed to move. Neglect viscosity and surface tension. When the levels equalize in the two arms, the liquid will–
physics-General
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A sealed tank containing a liquid of density moves with a horizontal acceleration a, as shown in the figure. The difference in pressure between the points A and B is–
A sealed tank containing a liquid of density moves with a horizontal acceleration a, as shown in the figure. The difference in pressure between the points A and B is–
physics-General
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Water coming out of the mouth of a tap and falling vertically in streamline flow forms a tapering column, i.e., the area of cross–section of the liquid column decreases as it moves down. Which of the following is the most accurate explanation for this :-
Water coming out of the mouth of a tap and falling vertically in streamline flow forms a tapering column, i.e., the area of cross–section of the liquid column decreases as it moves down. Which of the following is the most accurate explanation for this :-
physics-General
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Two very wide parallel glass plates are held vertically at a small separation d, and dipped in water. Some water climbs up in the gap between the plates. Let S be the surface tension of water, = atmospheric pressure, P = pressure of water just below the water surface in the region between the plates–
Two very wide parallel glass plates are held vertically at a small separation d, and dipped in water. Some water climbs up in the gap between the plates. Let S be the surface tension of water, = atmospheric pressure, P = pressure of water just below the water surface in the region between the plates–
physics-General
chemistry-
A square planar complex represented as:
A square planar complex represented as:
chemistry-General
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A square box of water has a small hole located in one of the bottom corner. When the box is full and sitting on a level surface, complete opening of the hole results in a flow of water with a speed 
, as shown in figure (1). When the box is tilted by 
and half filled so that the hole is at the lowest point. Now the water will flow out with a speed of:
A square box of water has a small hole located in one of the bottom corner. When the box is full and sitting on a level surface, complete opening of the hole results in a flow of water with a speed , as shown in figure (1). When the box is tilted by and half filled so that the hole is at the lowest point. Now the water will flow out with a speed of:
physics-General
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A non uniform cylinder of mass m, length 
and radius r is having its centre of mass at a distance /4 from the centre and lying on the axis of the cylinder. The cylinder is kept in a liquid of uniform density , The moment of inertia of the rod about the centre of mass is I. The angular acceleration of point A relative to point B just after the rod is released from the position shown in figure is :
A non uniform cylinder of mass m, length and radius r is having its centre of mass at a distance /4 from the centre and lying on the axis of the cylinder. The cylinder is kept in a liquid of uniform density , The moment of inertia of the rod about the centre of mass is I. The angular acceleration of point A relative to point B just after the rod is released from the position shown in figure is :
physics-General
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A U–tube of base length 
filled with same volume of two liquids of densities and 2 is moving with an acceleration 
on the horizontal plane. If the height difference between the two surfaces (open to atmosphere) becomes zero, then the height h is given by–
A U–tube of base length filled with same volume of two liquids of densities and 2 is moving with an acceleration on the horizontal plane. If the height difference between the two surfaces (open to atmosphere) becomes zero, then the height h is given by–
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A narrow tube completely filled with a liquid is lying on a series of cylinder as shown in figure. Assuming no sliding between any surfaces, the value of acceleration of the cylinders for which liquid will not come out of the tube from anywhere is given by
A narrow tube completely filled with a liquid is lying on a series of cylinder as shown in figure. Assuming no sliding between any surfaces, the value of acceleration of the cylinders for which liquid will not come out of the tube from anywhere is given by
physics-General
