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General
Easy
Question
The effective resistance between A and B in the given circuit is
The correct answer is:
Related Questions to study
Physics-
If a copper wire is stretched to increase its length by 0.1%. Then percentage of increase in its resistance will be
If a copper wire is stretched to increase its length by 0.1%. Then percentage of increase in its resistance will be
Physics-General
Physics-
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
Physics-
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.
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.
Physics-General
Physics-
As a liquid of density 
flows through the tube shown above in a streamlined way,
As a liquid of density flows through the tube shown above in a streamlined way,
Physics-General
Physics-
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. When the box is still half empty, it is tilted by 45° so the hole is at the lowest point Now the water will flow out with 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. When the box is still half empty, it is tilted by 45° so the hole is at the lowest point Now the water will flow out with speed of
Physics-General
Physics-
The velocity of the liquid coming out of a small hole of a vessel containing two different liquids of densities 
and as shown in figure is
The velocity of the liquid coming out of a small hole of a vessel containing two different liquids of densities and as shown in figure is
Physics-General
Physics-
A cylinder of square base (b × b) is kept on a rough horizontal surface so that it cannot slide but topple only. It is filled with water up to a height 2 h and a small hole of area a is punched in it at a height h. Water Leaks out horizontally from the hole. For what value of 'h', the cylinder does not get toppled?
A cylinder of square base (b × b) is kept on a rough horizontal surface so that it cannot slide but topple only. It is filled with water up to a height 2 h and a small hole of area a is punched in it at a height h. Water Leaks out horizontally from the hole. For what value of 'h', the cylinder does not get toppled?
Physics-General
Physics-
A vessel contains oil (density 
) over mercury (density 
). A uniform sphere floats with half its volume immersed in mercury and the other half in oil. The density of the material of sphere in 
is
A vessel contains oil (density ) over mercury (density ). A uniform sphere floats with half its volume immersed in mercury and the other half in oil. The density of the material of sphere in is
Physics-General
Physics-
A beaker containing water is kept on a spring scale. The mass of water and beaker is 5 kg. A block of mass 2 kg and specific gravity 10 is suspended by means of thread from a spring balance as shown. The readings of scales 
and 
are respectively [ Take 
]
A beaker containing water is kept on a spring scale. The mass of water and beaker is 5 kg. A block of mass 2 kg and specific gravity 10 is suspended by means of thread from a spring balance as shown. The readings of scales and are respectively [ Take ]
Physics-General
Physics-
A square plate of 0.1 meter side moves parallel to a second fixed plate with a velocity of 0.1 m/s, both plates being immersed in water. If the viscous force is 0.002 newtons and the coefficient of viscosity is 0.01 poise, distance between the plates in metre is
A square plate of 0.1 meter side moves parallel to a second fixed plate with a velocity of 0.1 m/s, both plates being immersed in water. If the viscous force is 0.002 newtons and the coefficient of viscosity is 0.01 poise, distance between the plates in metre is
Physics-General
Physics-
Through a very narrow gap of height h, a thin plate of large extension is pulled at a velocity v on one side of the plate there exists oil of viscosity 
and on the other side, oil of viscosity 
as shown. The position (y) of the plate so that (i) the shear force on the two sides of the plate is equal. (ii) the pull required to drag the plate is minimum respectively are
Through a very narrow gap of height h, a thin plate of large extension is pulled at a velocity v on one side of the plate there exists oil of viscosity and on the other side, oil of viscosity as shown. The position (y) of the plate so that (i) the shear force on the two sides of the plate is equal. (ii) the pull required to drag the plate is minimum respectively are
Physics-General
Physics-
A sliding fit cylindrical body of mass of 1 kg drops vertically down as shown in figure at a constant velocity of 5 cm/s. Find the coefficient of dynamic viscosity of the oil in pascal second.
A sliding fit cylindrical body of mass of 1 kg drops vertically down as shown in figure at a constant velocity of 5 cm/s. Find the coefficient of dynamic viscosity of the oil in pascal second.
Physics-General
Physics-
A non uniform cylinder of mass m, length 1 and radius r is having its centre of mass at a distance 1/4 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 1 and radius r is having its centre of mass at a distance 1/4 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
Physics-
A uniform rod OB of length 1 m, cross-sectional area 
and relative density 2.0 is free to rotate about O in vertical plane. The rod is held with a horizontal string AB which can withstand a maximum tension of 45 N. The rod and string system is kept in water in equilibrium as shown in figure. The maximum value of angle 
which the rod can make with vertical without breaking the string is
A uniform rod OB of length 1 m, cross-sectional area and relative density 2.0 is free to rotate about O in vertical plane. The rod is held with a horizontal string AB which can withstand a maximum tension of 45 N. The rod and string system is kept in water in equilibrium as shown in figure. The maximum value of angle which the rod can make with vertical without breaking the string is
Physics-General
Physics-
A hollow sphere of mass 50 kg and radius 
is immersed in a tank of water of density 
. The sphere is tied to the bottom of tank by two wires A and B as shown and is equilibrium. Tension in wire A is 
A hollow sphere of mass 50 kg and radius is immersed in a tank of water of density . The sphere is tied to the bottom of tank by two wires A and B as shown and is equilibrium. Tension in wire A is
Physics-General
