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- Question 1 of 16
Identify the CORRECT statement for the following vectors a = 3i + 2j and b = I + 2jCorrectIncorrect
- Question 2 of 16
Two uniform thin rods of equal length, L, and masses M1 and M2 are joined together along the length. The moment of inertia of the combined rod of length 2L about an axis passing through the mid-point and perpendicular to the length of the rod is,CorrectIncorrect
- Question 3 of 16
If the peak output voltage of a full wave rectifier is 10 V, its d.c. voltage isCorrectIncorrect
- Question 4 of 16
Which one of the following sets corresponds to fundamental particles?CorrectIncorrect
- Question 5 of 16
In case of a Geiger-Muller (GM) counter, which one of the following statements is CORRECT?CorrectIncorrect
- Question 6 of 16
A plane electromagnetic wave traveling in free space is incident normally on a glass plate of refractive index 3/2. If there is no absorption by the glass, its reflectivity isCorrectIncorrect
- Question 7 of 16
A Ge semiconductor is doped with acceptor impurity concentration of 1015 atoms/cm3. For the given hole mobility of 1800 cm2/V-s, the resistivity of this material is (read cm3 and cm2 as cm sqaure and cm cube)CorrectIncorrect
- Question 8 of 16
A classical gas of molecules, each of mass m, is in thermal equilibrium at the absolute temperature, T. The velocity components of the molecules along the Cartesian axes are Vx,Vy,Vz . The mean value of (Vx+Vy)*(Vx+Vy) isCorrectIncorrect
- Question 9 of 16
In a central force field, the trajectory of a particle of mass m and angular momentum L in plane polar coordinates is given by,
1/r = m(1+e cos b)/(L*L)
where, e is the eccentricity of the particle’s motion. Which one of the following choices for e gives rise to a parabolic trajectory?CorrectIncorrect
- Question 10 of 16
The first Stokes line of a rotational Raman spectrum is observed at 12.96 per cm. Considering the rigid rotor approximation, the rotational constant is given byCorrectIncorrect
- Question 11 of 16
Deuteron has only one bound state with spin parity 1+, isospin 0 and electric quadrupole moment 0.286 efm2. These data suggest that the nuclear forces are havingCorrectIncorrect
- Question 12 of 16
A particle of unit mass moves along the x-axis under the influence of a potential, V(x)= x*(x-2)*(x-2) . The particle is found to be in stable equilibrium at the point x=2 . The time period of oscillation of the particle is (pi is constant 3.14)CorrectIncorrect
- Question 13 of 16
Which one of the following CANNOT be explained by considering a harmonic approximation for the lattice vibrations in solids?CorrectIncorrect
- Question 14 of 16
The number of independent components of the symmetric tensor Aij with indices i, j = 1, 2, 3 isCorrectIncorrect
- Question 15 of 16
Match the typical spectroscopic regions specified in Group I with the corresponding type of transitions in Group II.
Group I Group II
(P) Infra-red region (i) electronic transitions involving valence electrons
(Q) Ultraviolet-visible region (ii) nuclear transitions
(R) X-ray region (iii) vibrational transitions of molecules
(S) Y-ray region (iv) transitions involving inner shell electronsCorrectIncorrect
- Question 16 of 16
Choose the CORRECT statement from the following.CorrectIncorrect