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- Question 1 of 16
##### 1. Question

In the SU(3) quark model, the triplet of mesons (pi+,pi0,pi-) has (pi is constant 3.14 and read +,-,0 as power)

CorrectIncorrect - Question 2 of 16
##### 2. Question

The total power emitted by a spherical black body of radius R at a temperature T is P1. Let P2 be the total power emitted by another spherical black body of radius R/2 kept at temperature 2T. The ratio, P1/P2 is _______. (Give your answer upto two decimal places)

CorrectIncorrect - Question 3 of 16
##### 3. Question

For a system at constant temperature and volume which of the following statements is correct at equilibrium?

CorrectIncorrect - Question 4 of 16
##### 4. Question

N atoms of an ideal gas are enclosed in a container of volume V.The volume of container is changed to 4V while keeping the total energy constant.The change in the entropy of the gas in units of NKbIn2 is _____ where Kb is Boltzmann constant

CorrectIncorrect - Question 5 of 16
##### 5. Question

Which of the following is an analytical function of z everywhere in the complex plane?

CorrectIncorrect - Question 6 of 16
##### 6. Question

In Young’s double slit experiment using light the apparatus has two slits of unequal widths when only slit-1 is open the maximum observed intensity on the screen is 4Io.When only slit-2 is open the maximum observed intensity is Io.When both the slits are open an interference pattern appears on the screen.The ratio of intensity of principal maximum to that of nearest minimum is

CorrectIncorrect - Question 7 of 16
##### 7. Question

A one dimensional linear chain of atoms contains two types of atoms of masses m1 and m2(where m2>m1) arranged alternatively.The distance between successive atoms is same.Assume that the harmonic approximation is valid.At the first Brillouin zone boundary which of the following statements is correct?

CorrectIncorrect - Question 8 of 16
##### 8. Question

The kinetic energy of a particle of rest mass 0 m is equal to its rest mass energy. Its momentum in units of m c 0 , where c is the speed of light in vacuum, is _______. (Give your answer upto two decimal places)

CorrectIncorrect - Question 9 of 16
##### 9. Question

Two blocks are connected by a spring of spring constant k . One block has mass m and the other block has mass 2m. If the ratio k/m = 4 per s2 , the angular frequency of vibration ω of the two block spring system in per s is _______. (Give your answer upto two decimal places) (read s2 as power of s)

CorrectIncorrect - Question 10 of 16
##### 10. Question

A particle moving under the influence of a central force F( r ) = -kr (where r is the position vector of the particle and k is a positive constant) has non-zero angular momentum. Which of the following curves is a possible orbit for this particle?

CorrectIncorrect - Question 11 of 16
##### 11. Question

The scattering of particles by a potential can be analyzed by Born approximation. In particular, if the scattered wave is replaced by an appropriate plane wave, the corresponding Born approximation is known as the first Born approximation. Such an approximation is valid for

CorrectIncorrect - Question 12 of 16
##### 12. Question

Consider an elastic scattering of particles in l = 0 states. If the corresponding phase shift A is 90 degree and the magnitude of the incident wave vector is equal to square root of (2*pi) f per m then the total scattering cross section in units of fm2 is (pi is constant 3.14 and fm2 is fm to the power 2)

CorrectIncorrect - Question 13 of 16
##### 13. Question

A solid material is found to have a temperature independent magnetic susceptibility , X = C.Which of the following statements is correct?

CorrectIncorrect - Question 14 of 16
##### 14. Question

An infinite, conducting slab kept in a horizontal plane carries a uniform charge density d . Another infinite slab of thickness t, made of a linear dielectric material of dielectric constant k, is kept above the conducting slab. The bound charge density on the upper surface of the dielectric slab is

CorrectIncorrect - Question 15 of 16
##### 15. Question

The number of spectroscopic terms resulting from the L.S coupling of a 3p electron and a 3d electron is

CorrectIncorrect - Question 16 of 16
##### 16. Question

Which of the following statements is NOT correct?

CorrectIncorrect