Recent questions tagged jeemain

A body is floating in a liquid. At two temperatures $ t_1^{\circ}C\: and \: t_2^{\circ}C$ of the liquid, fractions $f_1 \: and \: f_2 $ of the volumes of the body remain immersed in the liquid. Coefficient of volume expansion of the liquid is

asked Oct 20, 2013 by thanvigandhi_1

1 answer

Two capillary tubes A and B are arranged in parallel. A liquid flows through these capillary tubes under the same pressure head. Both the tubes have a same length. The radii of A and B are r and $\large\frac{r}{2}$ respectively. If the rate of flow of liquid through A is $8\: cm^3/s$ , then the rate of flow through the combination of A and B is

asked Oct 19, 2013 by thanvigandhi_1

2 answers

A capillary tube of radius 'r' is immersed in water and water rises in it to a height 'h'. Mass of water in the capillary tube is $ 5 \times 10^{-3}kg$ . Another capillary tube of radius $ \bigg( \large\frac{r}{2} \bigg)$ is immersed in water. The mass of water that will rise in this tube is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

The sum of rational terms in the expansion of $(2^{\large\frac{1}{5}}$$+\sqrt 3)^{20}$ is

asked Oct 19, 2013 by rvidyagovindarajan_1

1 answer

When a metallic wire is stretched with a tension $T_1$ its length is $l_1$ and with a tension $T_2$ its length is $l_2$. The original length of the wire is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

A mass is suspended from the end of a spring. When the system is oscillating the amplitude of oscillation is 4 cm and the maximum kinetic energy of oscillation of the system is 1 joule. Then the force constant of the spring is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

An artificial satellite of mass 'm' is revolving around in a circular orbit of radius 'r'. If the mass of earth is M , angular momentum of the satellite with respect to the centre of earth is ( G-Universal Gravitational Constant)

asked Oct 19, 2013 by thanvigandhi_1

1 answer

The sum of last $30$ coefficients in the expansion of $(1+x)^{59}$ when expanded in ascending power of $x$ is ?

asked Oct 19, 2013 by rvidyagovindarajan_1

1 answer

Two horizontal circular discs of different radii are free to rotate about their central axes. One disc is given some angular velocity and the other is stationary. Their rims are now brought in contact. Their is friction between the rims. Correct statement from the following is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

A circular disc rotates freely about a vertical axis through its centre with angular velocity $ \omega_1$ . A ring having the same mass and radius as the disc is placed on the disc and the system now rotates with an angular velocity $ \omega_2$ about the same vertical axis. Then $ \omega_2 / \omega_1$ is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

A block of mass 'm' is placed on floor of a lift which is rough. The coefficient of friction between the block and the floor is $ \mu$ . When the lift falls freely , the block is pulled horizontally on the lift floor. The force of friction is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

Two particles of mass 1 kg and 3 kg have position vectors $ 2 \overrightarrow i + 3\overrightarrow j+4\overrightarrow k \: and \: -2\overrightarrow i+3\overrightarrow j-4\overrightarrow k$ respectively. The position vector of centre of mass of the system is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

A 3 kg sphere makes an inelastic collision with another sphere at rest and they stick together after collision. After collision, the composite mass moves with a speed of $ \bigg( \large\frac{1}{4} \bigg)^{th}$ of the initial velocity of 3 kg sphere. The mass of second sphere is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

The apparent weight of a person in a lift moving downwards is half his apparent weight in the same lift moving upwards with the same acceleration. Acceleration of the lift is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

A ball at rest is dropped freely from a height of 20 m. It loses 30% of its energy on striking the ground and bounces back. The height to which it bounces back is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

A ball is thrown vertically upwards from the top of a tower. Velocity at a point 'h' m vertically below the point of projection is twice the download velocity at a point 'h' m vertically above the point of projection. The maximum height reached by the ball above the top of the tower is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

Displacement of a body is $( 5 \overrightarrow i+3\overrightarrow j-4\overrightarrow k)m$ when a force $( 6\overrightarrow i+6\overrightarrow j+4\overrightarrow k)N$ acts for 5 sec. The power in watt is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

The van der Waal equations for 'n' moles of a real gas is $ \bigg( p+ \large\frac{a}{V^2} \bigg) (V-b)=nRT$ where P is pressure, V is volume, T is absolute temperature, R is molar gas constant and a, b, c are Van der Waal constants.The dimensional formula for ab is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

A current of 16 A is made to pass through a conductor in which the number density of free electrons is $ 4 \times 10^{28}m^{-3}$ and its area of cross section is $ 10^{-5}m^2$. The average drift velocity of free electrons in the conductor is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

A non conducting ring of radius 0.5 m has charge of $ 1.11 \times 10^{-10}C$ distributed non-uniformly on its circumference. An electrical field is spread everywhere in space. The value of the potential at the center of the ring is ( approximately )

asked Oct 19, 2013 by thanvigandhi_1

1 answer

Three chargers Q, + q and + q are placed at the vertices of a right angle triangle ( isoceles triangle ) as shown . If the net electrostatic potential energy of the configuration is zero, value of Q is

asked Oct 19, 2013 by thanvigandhi_1

1 answer

Thermoreceptor sensillea of Cockroach are located on

asked Oct 19, 2013 by thanvigandhi_1

1 answer

Identify the set of hormones that are not antagonistic in function

asked Oct 19, 2013 by thanvigandhi_1

1 answer

One of the following shows arrhenotoky in its development

asked Oct 19, 2013 by thanvigandhi_1

1 answer

In the brain of Rabbit, Aqueduct of sylvius is located in

asked Oct 19, 2013 by thanvigandhi_1

1 answer

Match the following

asked Oct 19, 2013 by thanvigandhi_1

1 answer

Tendon like cords extending between atrioventricular valves and papillary muscles in the heart of Rabbit are

asked Oct 19, 2013 by thanvigandhi_1

1 answer

Which of the following applies to "Bohr effect"?

asked Oct 18, 2013 by thanvigandhi_1

1 answer

The hormone that increases the rate of $Ca^{++}$ absorption from the gastrointestinal tract into the blood is

asked Oct 18, 2013 by thanvigandhi_1

1 answer

Identify the correct statement with reference to 'arbor vitae' in the brain of Rabbit

asked Oct 18, 2013 by thanvigandhi_1

1 answer

Statement (S) : Carbon dioxide produced as a result of cellular respiration combines with water to form carbonic acid that increases the blood pH. Reasons (R) : $CO_2$ must be eliminated from the body to maintain homeostatis.

asked Oct 18, 2013 by thanvigandhi_1

1 answer

Match the following

asked Oct 18, 2013 by thanvigandhi_1

1 answer

Statement (S) : In Rabbit, caecum of large intestine is important for cellulose digestion. Reasons (R) : Large intestine secretes an enzyme known as cellulase to digest cellulose in rabbit.

asked Oct 18, 2013 by thanvigandhi_1

1 answer

Paedomorphosis is seen in

asked Oct 18, 2013 by thanvigandhi_1

1 answer

Corvus splendens insolens is the subspecies of crow found in

asked Oct 18, 2013 by thanvigandhi_1

1 answer

Match the following

asked Oct 18, 2013 by thanvigandhi_1

1 answer

The structures furcula, urostyle, endostyle are present respectively in

asked Oct 18, 2013 by thanvigandhi_1

1 answer

In Fraunhoffer diffraction experiment , L is the distance between screen and the obstacle, b is the size of the obstacle and $\lambda$ is wavelength of incident light. The general condition for the applicability of Frauhoffer diffraction is

asked Oct 18, 2013 by meena.p

1 answer

An achromatic combination of lenses produces

asked Oct 18, 2013 by meena.p

1 answer

Statement (S) : Using Huygen's eye piece measurement can be taken but are not correct. Reason(R) : The cross wires, scale and final image are not magnified proportionately because the image of the object is magnified by two lenses, whereas the cross wire scale is magnified by one lens only.Identify the correct one of the following :

asked Oct 18, 2013 by meena.p

1 answer

The refractive index of a material of a plano concave lens is $\large\frac{5}{3}$, the radius of curvature is $0.3\;m$. The focal length of the lens in air is

asked Oct 18, 2013 by meena.p

1 answer

A car is moving with a speed of 72 kmph towards a hill. Car blows horn at a distance of 1800 m from the hill. If echo is heard after 10 seconds, the speed of sound (in m/sec.) is

asked Oct 18, 2013 by meena.p

1 answer

When a sound wave of wavelength $'\lambda'$ is propagating in a medium, the maximum velocity of the particle is equal to the wave velocity. The amplitude of wave is

asked Oct 18, 2013 by meena.p

1 answer

What type of practice is applied for culture of ' cat fish '?

asked Oct 18, 2013 by thanvigandhi_1

1 answer

Two slabs A and B of equal surface area are placed one over the other such that their surfaces are completely in contact. The thickness of slab A is twice that of B. The coefficient of thermal conductiviy of slab A is twice that of B. The first surface of slab A is maintained at $100^{\circ}C$, while the second surface of slab B is maintained at $25^{\circ}$. The temperature at the contact of their surfaces is

asked Oct 18, 2013 by meena.p

0 answers

Which of the following is true in the case of an adiabatic process , where $ \gamma=Cp/Cv?$

asked Oct 18, 2013 by meena.p

0 answers

In the adiabatic compression, the decrease in volume is associated with

asked Oct 18, 2013 by meena.p

1 answer

There is some change in length when a 33000 N tensile force is applied on a steel rod of area of cross- section $10^{-3}m^2.$ The change of temperature required to produce the same elongation if the steel rod is heated, is (The modulus of Elasticity is $3 \times 10^{11}\;N/m^2$ and the coefficient of linear expansion of steel is $1.1 \times 10^{-5}/^{\circ}C)$.

asked Oct 18, 2013 by meena.p

1 answer

One litre of oxygen at a pressure of 1 atm. and two litres of nitrogen at a pressure of $0.5\;atm.$ are introduced into a vessel of volume 1 litre. If there is no change in temperature, the final pressure of the mixture of gas (in atm) is

asked Oct 18, 2013 by meena.p

1 answer

Two rain drops reach the Earth different terminal velocities having ratio $9:4$. Then the ratio of their volume is

asked Oct 18, 2013 by meena.p

1 answer

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