Recent questions in Physics

A gas with $\large\frac {C_p}{C_v} = \gamma$ goes from an initial state of $(P_1,V_1,T_1)$ to a final state of $(P_2,V_2,T_2)$ through an adiabatic process. The work done by the gas is?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

In a given process, $\large\frac{1}{k}$th part of the supplied heat goes in raising internal energy of the gas. Finding the molar specific heat of the gas and the process gives?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

In a given gas sample of Hydrogen, one fifth of the heat supplied is used to raise the internal energy of the gas. Finding the molar specific heat of the gas gives?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Neon gas has undertaken a process in which the pressure and the volume are changed according to the equation $P=kV^k$. The molar hear capacity of the gas for the process is given by?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Helium gas has undertaken a process in which the pressure and the volume are changed according to the equation $P=kV^2$. If $C_v$ is the molar specific heat at constant volume, then the molar hear capacity of the gas for the process is given by?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Light is incident normally on a diffraction grating through first order diffraction is seen at $32^{\circ}$ second order diffraction will be seen at

asked Jan 22, 2014 by meena.p

1 answer

If $2$ moles of an ideal monoatomic gas at tempterature $5T_0$ is mixed with $3$ moles of another ideal monoatomic gas at temperature $3T_0$, what will be the temperature of the mixture?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

A vessel of height h is half filled with one liquid of refractive index $\mu_1 $ and upper half filled with another liquid of refractive index $\mu_2$ The apparent depth of the vessel is

asked Jan 22, 2014 by meena.p

1 answer

If $1$ mole of an ideal monoatomic gas is mixed with 2 moles of an ideal diatomic gas, what is the temperature of the given mixture, given that the monoatomic gas is at temperature $T_0$ and diatomic gas is at temperature $2T_0$?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

A beam of light strikes a pieces of glass at an angle of incidence of $60^{\circ}$ and the reflected beam is completely plane polarized . The refractive index of glass is

asked Jan 22, 2014 by meena.p

1 answer

A student conducted an experiment and found that an ideal gas obeys the condition $\large\frac{p^2}{\rho} = $ constant. Initially the gas is at a temperature $T$, pressure $p$ and density $\rho$. The gas expands such that the density changes to $\rho/2$, which of the following is true?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

A coin lies at the bottom of a tank filled with two immissible liquid. Liquid 1 on top is $20\;cm$ layer thick of refractive index $\mu_1 =1.33$ and liquid 2 is $40\;cm$ thick with refractive index $\mu_2=1.46$. At what depth below the surface the coin appear?

asked Jan 22, 2014 by meena.p

1 answer

The pressure versus volume graph for an ideal gas of equal number of moles at different temperature are plotted as shown in the figure. Choose the correct alternative:

asked Jan 22, 2014 by balaji.thirumalai

1 answer

A pressure-temperature graph of an ideal gas is shown below. Choose the correct alternative (assume equal number of moles of different volumes).

asked Jan 22, 2014 by balaji.thirumalai

1 answer

In the cylinder shown below the two pistons are connected by a string. Assume that the piston can move freely, what happens when the gas trapped between the pistons are heated?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

Three different gases, one monoatomic, one diatomic and one triatomic are expanded adiabatically under similar conditions, i.e., their final and initial conditions are the same. The least amount of work is done in the case of which gas?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

The below graph shows the behaviour of 3 gases undergoing adiabatic expansion. Which of the following can be true?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

A closed vessel moving with a velocity $v$ (with zero acceleration) is stopped suddenly. If the vessel contains a gas of molecular mass $M$, what will the rise in temperature of the gas be?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

One mole of a monoatomic ideal gas is mixed with two moles of a diatomic gas. What is the molar specific heat of the mixture at constant volume?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

If under standard conditions a gas of density $1.2 kg/m^3$ has sound propagating in it with velocity of $340 m/s$, what is its atomicity/

asked Jan 22, 2014 by balaji.thirumalai

1 answer

An air bubble is at the bottom of the lake at $40m$ deep where the temperature is $6^{\circ}C$. The bubble rises to the surface where the temperature is $20^{\circ}C$ If it's volume at the bottom is $50\;cm^3$, what is its volume at the surface?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

A point object is placed in front of a thin lens of focal length $f= 0.50\;m$ at a distance of $1.0\;m$ . A flat mirror is placed 2 m behind the lens. What is the distance between the lens and the final image formed.

asked Jan 22, 2014 by meena.p

1 answer

Two thin lenses of focal lengths $f_1$ and $f_2$are in contact , the equivalent focal length is

asked Jan 22, 2014 by meena.p

1 answer

An air bubble is at the bottom of the lake at $40\;m$ deep where the temperature is $0^{\circ}C$. The bubble rises to the surface where the temperature is $20^{\circ}C$ If it's volume at the bottom is $50\;cm^3$, what is its volume at the surface?

asked Jan 22, 2014 by balaji.thirumalai

1 answer

A parallel beam of light is incident on a solid transparent sphere of refractive inbox $\mu$. If a point image is formed on the back of the sphere , the refractive index of sphere is

asked Jan 22, 2014 by meena.p

1 answer

A Young's double slit experiment is done in air and the same set up is immersed in a liquid of refractive index $\mu$. It is found that the 10th bright fringe in liquid was in the same position as 6th dark fringe in air . The value of $\mu$ is

asked Jan 22, 2014 by meena.p

1 answer

The equiconvex lens of glass of $\mu =1.5$ and focal length $15\;cm$ is silvered on one side. It will behave like.

asked Jan 22, 2014 by meena.p

1 answer

Magnification produced by astronomical telescope for normal adjustment is 20 and length of telescope is $1.05\;m$ The magnification when image is formed at least distance of district vision $(D= 25 cm)$ is

asked Jan 22, 2014 by meena.p

1 answer

A microscope has objective of focal $1.5\; cm$ and eye piece of focal length $2.5 \;cm$. If length of tube $25\;cm$ What must be the magnification produced.

asked Jan 22, 2014 by meena.p

1 answer

A system consists of a convex lens and a concave mirror placed at a distance of x from the lens. Focal length $f_1$ of convex lens in 10 cm and focal length $f_2$ of mirror is 60 cm. If an object is placed at a distance 20 cm from the lens and it is found that the final image coincides with the object position, then what must be the distance 'x'

asked Jan 22, 2014 by meena.p

1 answer

An object is kept at a distance of 12 cm from a thin lens and image formed is real. If the object is kept at a distance of $8\;cm$ from the same lens image formed is virtual. If the size of image formed is equal length of lens will be :

asked Jan 22, 2014 by meena.p

1 answer

Two rays of light travel as shown.The refractive index of material is 3/2 and that of the surrounding is 4/3. What is the path difference between the two.

asked Jan 22, 2014 by meena.p

1 answer

A system of lenses is formed by fitting a plans convex lens, whose radius of curvature is R and $\mu_1$,the refractive index of plano convex lens is $\large\frac{3}{2} $ and $\mu_2$ the refractive index of Plano concave lens is $\large\frac{4}{3}$. Then the focal length of combination is

asked Jan 22, 2014 by meena.p

1 answer

A system of lens consists of two convex lenses of focal length $f_1= 30\;cm$ and $f_2 =20\;cm$. Separated by a distance 'd'. When a parallel beam of light is incident on the first lens after two refraction the resultant rays come out parallel then the distance 'd' is

asked Jan 22, 2014 by meena.p

1 answer

A convex lens of focal length 20 cm is placed glass slab of refractive index $\large\frac{3}{2}$.A parallel beam of light is incident on the convex lens. The light will converge.

asked Jan 22, 2014 by meena.p

1 answer

In an young double slit experiment the slit separation is 3 times the wave length of the light used What is the maximum number of interference maxima possible

asked Jan 22, 2014 by meena.p

1 answer

Two light waves whose equation are given respectively as $y_1 = 6\sin wt; y_2 =8 \sin (wt+ 8)$ super impose to form a interference pattern. The ratio of maximum to minimum intensities of the super imposed wave is

asked Jan 21, 2014 by meena.p

1 answer

A man can view through telescope two district objects at a distance of $120 \;m$ from him if he uses light of $ \lambda= 550 A^{\circ}$ What must be minimum separation between objects if diameter of his pupil $D= 2.5 \;mm$

asked Jan 21, 2014 by meena.p

1 answer

Parallel beam of monochromatic light of wavelength $\lambda =4800 \mathring{A}$ is incident on a single slit of size $0.2 mm$ . The angular divergence in which most of light is diffracted is [ie between two 1st order maxima on both sides]

asked Jan 21, 2014 by meena.p

1 answer

In Fresnel bi prism experiment if prism angle $\alpha=1^{\circ}, \mu=1.54$ distance between prism and sources a is $0.3\;m$ and wave length $ \lambda= 180 \pi \;nm$ find the fringe width, distance between screen and prism $b= 0.7 \;m$

asked Jan 21, 2014 by meena.p

1 answer

In a young's double slit experiment two films of same thickness 't' but of different refractive indices $\mu_1$ and $\mu_2$ are placed in front of slit A and B respectively. If $( \mu_1 > \mu_2)$ the central maxima will

asked Jan 21, 2014 by meena.p

1 answer

An interference pattern is obtained by using red light. If in the same set up red light is replaced by blue light the fringe width will

asked Jan 21, 2014 by meena.p

1 answer

A young's double slit experiment uses light of wavelength $900\; nm$ A plate of thickness 't' of material of refractive index $\mu=1.5$ i placed in front of one of the slits. What should be the thickness of plate 't' so that the central fringe becomes dark.

asked Jan 21, 2014 by meena.p

1 answer

As a result of interference of two coherent source of light , the energy is :

asked Jan 21, 2014 by meena.p

1 answer

Two light sources emit light of same wavelength $\lambda$. They will form interfering patterns if

asked Jan 21, 2014 by meena.p

1 answer

If a light beam is incident at polarising angle, $(55.3^{\circ})$ on glass air interface , What is angle of refraction in glass?

asked Jan 21, 2014 by meena.p

1 answer

What is dispersive power of glass if $\mu_v =1.522$ and $\mu_r =1.514$

asked Jan 21, 2014 by meena.p

1 answer

Two glass prisms of refractive index $1.5$ and $ 1.6$ are kept in contact and a ray of light is incident on this combination of prism. The light emerges out of this combination un deviation The angle of prism of refractive index $1.6 $ is $5^{\circ}$ What is angle of prism of the other prism.

asked Jan 21, 2014 by meena.p

1 answer

Speed of light is maximum in

asked Jan 21, 2014 by meena.p

1 answer

Focal length of eye piece of a compound microscope is

asked Jan 21, 2014 by meena.p

1 answer

Ask Questions, Get Answers