### ALL Questions

## A ball of density p0 falls from rest from point P onto the surface of a liquid of density p0 in time T. It enters the liquid stops moves up and returns to P in a total time 3T. Neglect viscosity, surface tension and splashing. The ratio p/p0 is equal to

A ball of density p0 falls from rest from point P onto the surface of a liquid of density p0 in time T. It enters the liquid stops moves up and returns to P in a total time 3T. Neglect viscosity, surface tension and splashing. The ratio p/p0 is equal to

## An engine whistling at a constant frequency n0 and moving with a constant velocity goes past a stationary observer. As the engine crosses him, the frequency of the sound heard by him changes by a factor f. The actual difference in the frequency of the sound heard by him before and after the engine across him is

An engine whistling at a constant frequency n0 and moving with a constant velocity goes past a stationary observer. As the engine crosses him, the frequency of the sound heard by him changes by a factor f. The actual difference in the frequency of the sound heard by him before and after the engine across him is

## A flat coil of area A and n turns is placed at the centre of a ring of radius r (r2 >> A) and resistance R. The two are co-planar when current in the coil increases from zero to i, the total charge circulating in the ring is

A flat coil of area A and n turns is placed at the centre of a ring of radius r (r2 >> A) and resistance R. The two are co-planar when current in the coil increases from zero to i, the total charge circulating in the ring is?

## 2 masses of 4kg and 6kg kept at a distance of 2m.Where the 3rd mass be placed,the gravitational be zero?

2 masses of 4kg and 6kg kept at a distance of 2m.Where the 3rd mass be placed,the gravitational be zero

## Calculate the fringe width for light of wavelength 550 nm in a Young's slit experiment where the double slits are separated by 0.75 mm and the screen is placed 0.80 m from them.

Calculate the fringe width for light of wavelength 550 nm in a Young's slit experiment where the double slits are separated by 0.75 mm and the screen is placed 0.80 m from them.

## In Young’s double slit experiment when wavelength of 700 nm is used then fringe width of 0.7 mm is obtained. If wavelength of 500 nm is used then what is the fringe width?

## 3. Monochromatic green light has wavelength 5x10-7m. The separation between slits is 1mm. The fringe width of interference pattern obtained on screen at a distance of 2 meter is:-

## 2. If in a young’s double slit expirement, width between the slits is 3 cm, the separation between slits and screen is 7 cm and wavelength of light is 1000A, then fringe width will be.

## In YOSE experiment, when two light waves make third minima. Then they have.

## hc

Sample of 2,3 dibromopentane is heat in zinc dust the resulting compound is isolated and heated with hi in presence of p to yield---------

## In a crystal structure of an element, atoms are present in ccp arrangement and tetrahedral voids, which of the following relation between the atomic radius and edge length is correct for the unit cell which is formed in this arrangement? (a is the edge length and R is the radius of atom)

In a crystal structure of an element, atoms are present in ccp arrangement and tetrahedral voids, which of the following relation between the atomic radius and edge length is correct for the unit cell which is formed in this arrangement? (a is the edge length and R is the radius of atom)

## The normal at P to a hyperbola of eccentricity e, intersects its transverse and conjugate axes at L and M respectively. If locus of the mid-point of LM is hyperbola, then eccentricity of the hyperbola is?

The normal at P to a hyperbola of eccentricity e, intersects its transverse and conjugate axes at L and M respectively. If locus of the mid-point of LM is hyperbola, then eccentricity of the hyperbola is?

## The focal length of the objective of a microscope is 2cm.The final image of object placed 3cm from the objective is formed at least distance of the distinct vision.if the magnifying power is 10 then calculate focal length of eyepiece.

The focal length of the objective of a microscope is 2cm.The final image of object placed 3cm from the objective is formed at least distance of the distinct vision.if the magnifying power is 10 then calculate focal length of eyepiece.

## The number of ordered pairs (x, y) of real numbers satisfying 4x^2 -4x + 2 = sin^2y and x^2+ y^2<=3 is equal to ?

The number of ordered pairs (x, y) of real numbers satisfying

is equal to ?

## The pH of a H2 SO4 solution is 2. The pH of this solution, if equal volume of 0.2 M NaCl solution is added to it, will be?

The pH of a H2 SO4 solution is 2. The pH of this solution, if equal volume of 0.2 M NaCl solution is added to it, will be:

## A copper rod of length L and mass m is sliding down a smooth inclined plane of inclination theta angle with a constant speed v. A current I is flowing in perpendicular to the plane of diagram inwards. A vertically upward magnetic field B exists in this region. The magnitude of the required magnetic B is?

A copper rod of length L and mass m is sliding down a smooth inclined plane of inclination with a constant speed v. A current I is flowing in perpendicular to the plane of diagram inwards. A vertically upward magnetic field B exists in this region. The magnitude of the required magnetic B is?

## A body oscillates with amplitude of 10 cm in a horizontal platform. The maximum angular frequency which the platform can vibrate vertically such that body of mass 10 kg will not leave contact is

**A body oscillates with amplitude of 10 cm in a horizontal platform. The maximum angular frequency which the platform can vibrate vertically such that body of mass 10 kg will not leave contact is **

## A long Sighted can see distinctly object beyond 1 m.Calculate the power of less for the this person for normal vision?

A long Sighted can see distinctly object beyond 1 m.Calculate the power of less for the this person for normal vision?

## A uniform circular disc of masss 12 kg is held by 2 identical springs when disc is pressed down slightly and released it executes shm with time period of2 s the force constant of each spring is [2 spring in parallel]

A uniform circular disc of masss 12 kg is held by 2 identical springs when disc is pressed down slightly and released it executes shm with time period of2 s the force constant of each spring is [2 spring in parallel]

## . If a convex lens of focal length 50 cm are combined together. What will be their resulting power.

## An Astronomical telescope has focal lengths 100 & 10 cm of objective and eyepiece lens respectively when final image is formed at least distance of distinct vision, magnifying power of telescope will be.

## . Least Distance Of Distinct Vision Is 25 Cm. What Will Be Magnifying Power Of Simple Microscope Of Focal Length 5 Cm, Id Final Image Is Formed At Minimum Distance Of Distinct Vision.

## The Focal length of the objective and eye piece of a telescope are respectively 100 cm and 2 cm. The moon subtends an angle of 0.50 at the eye. If it is looked through the telescope, the angle subtended by the moon’s image will be.

## . If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting. Calculate the focal length of objective.

## . Least distance of distinct vision is 25 cm. What will be magnifying power of simple microscope of focal length 5 cm, id final image is formed at minimum distance of distinct vision.

## Two blocks of masses 6kg and 4kg connected by a rope of mass 4 kg are resting on frictionless floor as shown. If a constant force of 21 Newton is applied to 6 kg block, tension (In N) in the rope at point B is (CB : BA = 1 : 1)

Two blocks of masses 6kg and 4kg connected by a rope of mass 4 kg are resting on frictionless floor as shown. If a constant force of 21 Newton is applied to 6 kg block, tension (In N) in the rope at point B is (CB : BA = 1 : 1)

## What are anisotropic substance

## In a hemispherical shell of radius R, a rod of mass (root 3)/2 kg is placed horizontally. The length of rod is R. Find the normal reaction at any end of the rod (in N).

In a hemispherical shell of radius R, a rod of mass kg is placed horizontally. The length of rod is R. Find the normal reaction at any end of the rod (in N).

## The number of solutions of sin

The number of solutions of

is

## How many maximum number of electrons of an atom have the following set of quantum numbers? n = 4, l = 0, 1, 2, m = 0, +1, s = -1⁄2

How many maximum number of electrons of an atom have the following set of quantum numbers? n = 4, l = 0, 1, 2, m = 0, +1, s = -1⁄2

## Sound wave

The ratio of speed of sound wave in neon to that in water vapours at any temperature is

## What is the azimuthal quantum number of the unpaired electron of chlorine?

What is the azimuthal quantum number of the unpaired electron of chlorine?

## The electron of hydrogen atom was excited from ground state to a higher orbit. During de-excitation of the electron, photons of six different wavelengths were emitted. If each photon forms a spectral line, how many spectral line will be visible to naked eye?

The electron of hydrogen atom was excited from ground state to a higher orbit. During de-excitation of the electron, photons of six different wavelengths were emitted. If each photon forms a spectral line, how many spectral line will be visible to naked eye?

## What is the sum of the number of electrons with l = 0 and l = 2 present in Cu+ ion?

What is the sum of the number of electrons with l = 0 and l = 2 present in Cu+ ion?

## The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is ?

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is ?

## For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 mL of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is ?

For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 mL of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is ?

## The variance of first 50 even natural numbers is?

The variance of first 50 even natural numbers is:

## What is Human excretory system? explain?

What is Human excretory system? explain?

## When a rubber-band is stretched by a distance x, it exerts a restoring force of magnitude F = ax + bx^2 where a and b are constants. The work done in stretching the unstretched rubber-band by L is ?

When a rubber-band is stretched by a distance x, it exerts a restoring force of magnitude F = ax + bx*x where a and b are constants. The work done in stretching the unstretched rubber-band by L is ?

## A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 10^4 V/m, the charge density of the positive plate will be close to

A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric constant 2.2 between them. When the electric field in the dielectric is 10000 V/m, the charge density of the positive plate will be close to

## The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature is raised by 100°C is ?

The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature is raised by 100°C is ?

(For steel Young’s modulus is (2 × 10^11) N/m^2 and coefficient of thermal expansion is 1.1 × 10^-5 K^-1)

## A block of mass m is placed on a surface with a vertical cross section given by y =x^3/ 6 . If the coefficient of friction is 0.5, the maximum height above the ground at which the block can be placed without slipping is ?

A block of mass m is placed on a surface with a vertical cross section given by

.

If the coefficient of friction is 0.5, the maximum height above the ground at which the block can be placed without slipping is ?

## If 9th term of AP is 12 and 10the term is 18.what will be 18the term?

If 9th term of AP is 12 and 10the term is 18.what will be 18the term?

## Calculate the moment of inertia of two dimensional rod?

Calculate the moment of inertia of two dimensional rod?

## Calculate the Moment of inertia of a ring?

Calculate the Moment of inertia of a ring?

## Two proton of equal kinetic energies enters a region of uniform magnetic field.the first proton enters normal to the electric field direction while the second enters atva 30to the field direction name the trajectories follow by them

## rotation

The mi of a rod abt an axis through its axis and perpendicular to it is 1/12ml^2 the rod bent in middle so that 2 halves make angle 60 mi of bent rod abt same axis is

## The straight thin uniform rod of length 4l and mass 4m is force to bent in shape of square.It moment of inertia of any side of the square is?

The straight thin uniform rod of length 4l and mass 4m is force to bent in shape of square.It moment of inertia of any side of the square is?

## rotation

a square is made by joining 4 rods each of mass m and length its mi abt an axis pq in its plane and is passing through 1 of its end

## Calculate the pH of an acetate buffer that is a mixture with 0.10 M acetic acid and 0.10 M sodium acetate?

Calculate the pH of an acetate buffer that is a mixture with 0.10 *M* acetic acid and 0.10 *M* sodium acetate?