NEET 2013 (Karnataka)

The primary of a transformer when connected to a dc battery of 10 Volt draws a current of 1 mA. The number of turns of the primary and secondary windings are 50 and 100 respectively. The voltage in the secondary and the current drawn by the...

How does the Binding Energy per nucleon vary with the increase in the number of nucleons ?

\(\alpha\)-particles, \(\beta\)-particles and \(\gamma\)-rays are all having same energy. Their penetrating power in a given medium in increasing order will be

An electron in hydrogen atom makes a transition n1 \(\to\) n2 where n1 and n2 are principal quantum numbers of the two states . Assuming Bohr's model to be valid, the time period of the electron in the initial state is eight times that in...

A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth surface and fires 10 shots horizontally, in 5 s. Each bullet has a mass of 10 g with a muzzle velocity of 800 m s\(-\)1. The final velocity acquired b...

A 12 cm wire is given a shape of a right angled triangle ABC having sides 3 cm, 4 cm and 5 cm as shown in the figure. The resistance between two ends (AB, BC, CA) of the respective sides are measuread one by one ratio

Ten identical cells connected in series are needed to heat a wire of length one meter and radius 'r' by 10oC in time 't'. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in tim...

Two rods are joined end to end, as shown. Both have a cross-sectional area of 0.01 cm2. Each is 1 meter long. One rod is of copper with a resistivity of 1.7 \(\times\) 10\(-\)6 ohm-centimeter, the other is of iron with a resistivity of 10...

A source of light is placed at a distance of 50 cm from a photo cell and the stopping potential is found to be V0. If the distance between the light source and photo cell is made 25 cm, the new stopping potential will be :

The de-broglie wavelength of neutrons in thermal equilibrium at temperature T is

A current of 2.5 A flows through a coil of inductance 5 H. The magnetic flux linked with the coil is

An electromagnetic wave of frequency \(\upsilon = 3.0\) MHz passes from vaccum into a dielectric medium with relative permittivity \({{\varepsilon _r}}\) = 4.0. Then

A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium if q is equal to

An electric dipole of dipole moment p is aligned parallel to a uniform electric field E. The energy required to rotate the dipole by 90o is

Two plane mirrors are inclined at 70o. A ray incident on one mirror at angle, \(\theta\) after reflection falls on second mirror and is reflected from there parallel to first mirror. The value of \(\theta\) is

A particle of mass 'm' is kept at rest at a height 3R from the surface of earth, where 'R' is radius of earth and 'M' is mass of earth. The minimum speed with which it should be projected , so that it does not return back, is
(g is acceler...

The radius of a planet is twice the radius of earth. Both have almost equal average mass densities. VP and VE are escape velocities of the planet and the earth, respectively, then

In a vessel, the gas is at pressure P. If the mass of all the molecules is halved and their speed is doubled, then the resultant pressure will be

Two Carnot engines A and B are operated in series. The engine A receives heat from the source at temperature T1 and rejects the heat to the sink at temperature T. The second engine B receives the heat at temperature T and rejects to its si...

A system is taken from state a to state c by two paths adc and abc as shown in the figure. The internal energy at a is \({U_a} = 10\,J\). Along the path adc the amount of heat absorbed dQ1 \(=\) 50 J and the work obtained dW1 \(=\) 20 J whe...

Which of the following relations does not give the equation of an adiabatic process, where terms have their usual meaning?

A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/s. A bob is suspended from the roof of the car by a light wire of length 1.0 m. The angle made by the wire with the vertical is

A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by each pole of the magnet, the length of the magnet will be

Vectors \(\overrightarrow A ,\overrightarrow B\) and \(\overrightarrow C\) are such that \(\overrightarrow A .\overrightarrow B = 0\) and \(\overrightarrow A .\overrightarrow C = 0\). Then the vector parallel to \(\overrightarrow A\) i...

The displacement 'x' (in meter) of a particle of mass 'm' (in kg) moving in one dimension under the action of a force, is related to time 't' (in sec) by t = \(\sqrt x + 3\). The displacement of the particle when its velocity is zero, wil...

A circular coil ABCD carrying a current 'i' is placed in a uniform magnetic field. If the magnetic force on the segment AB is \(\overrightarrow F\), the force on the remaining segment BCDA is

A long straight wire carries a certain current and produces a magnetic field 2 \(\times\) 10\(-\)4 Wb m\(-\)2 at a perpendicular distance of 5 cm from the wire. An electron situated at 5 cm from the wire moves with a velocity 107 m/s towa...

A particle of mass m oscillates along x-axis according to equation x = asin\(\omega\)t. The nature of the graph between momentum and displacement of the particle is

The density of water at 20oC is 998 kg/m3 and at 40oC is 992 kg/m3. The coefficient of volume expansion of water is

A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the following statements is correct?

If the ratio of diameters, lengths and Young's modulus of steel and copper wires shown in the figure are p, q and s respectively, then the corresponding ratio of increase in their lengths would be

Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are K1 and K2 and cross sectional areas A1 and A2, respectively. If the rate of heat conduction in 1 is four times that...

Two discs are rotating about their axes, normal to the discs and passing through the centres of the discs. Disc D1 has 2 kg mass and 0.2 m radius and initial angular velocity of 50 rad s\(-\)1. Disc D2 has 4 kg mass, 0.1 m radius and initia...

The ratio of radii of gyration of a circular ring and a circular disc, of the same mass and radius, about an axis passing through their centres and perpendicular to their planes are

In an unbiased p-n junction, holes diffuse from the p-region to n-region because of

One way in which the operation of a n-p-n transistor differs from that of a p-n-p

The output from a NAND gate is divided into two in parallel and fed to another NAND gate. The resulting gate is a

The pair of quantities having same dimensions is

The reddish appearance of the sun at sunrise and sunset is due to

In Young's double slit experiment the distance between the slits and the screen is doubled. The separation between the slits is reduced to half. As a result the fringe width

A parallel beam of light of wavelength \(\lambda\) is incident normally on a narrow slit. A diffraction pattern formed on a screen placed perpenficular to the direction of the incident beam. At the second minimum of the diffraction pattern...

The length of the wire between two ends of a sonometer is 100 cm. What should be the positions of two bridges below the wire so that the three segments of the wire have their fundamental frequencies in the ratio 1 : 3 : 5.

Two sources P and Q produce notes of frequency 660 Hz. each. A listener moves from P to Q with a speed of 1 ms\(-\)1. If the speed of sound is 330 m/s, then the number of beats heard by the listener per second will be

A particle with total energy E is moving in a potential energy region U(x). Motion of the particle is restricted to the region when

One coolie takes 1 minute to raise a suitcase through a height of 2 m but the second coolie takes 30 s to raise the same suitcase to the same height. The powers of two coolies are in the ratio