Multiple Choice Questions on Engineering Physics
1- Meson theory can explain
(A) Conservation of momentum
(B) Beta decay
(C) Hydrogen spectrum
(D) Nuclear stability
2- Schottky defect is
(A) missing of ion from lattice point
(B) change in position of ion from actual lattice point
(C) at the edge of crystalline solid
(D) presence of different ion at the lattice point
3- Bragg’s plane is the ________ bisector to the line joining the origin of reciprocal space to any reciprocal lattice point.
(A) Perpendicular
(B) Equidistant
(C) Vertical
(D) Angular
4- Density of allowed energy states in 2-dimensional solids is
(A) proportional to energy
(B) proportional to square root of energy
(C) inversely proportional to square root of energy
(D) independent of energy
5- Which of the following property in metals is not determined by the valance electrons?
(A) Electric conductivity
(B) Thermal conductivity
(C) Lustre
(D) Modulus of rigidity
6- At sufficiently high temperature, thermal conductivity of non-conducting solids
(A) is directly proportional to temperature
(B) is inversely proportional to temperature
(C) is independent of temperature
(D) is zero
7- Which of the following is not a requirement for achieving population inversion in Lasers?
(A) Metastable State
(B) Stimulated Absorption
(C) Stimulated Emission
(D) Optical Pumping
8- Vibrational energy levels correspond to ______ region of electromagnetic spectrum.
(A) Ultraviolet Region
(B) Visible Region
(C) Infrared Region
(D) X-ray
9- In Raman scattering of a diatomic molecule, the shifted frequency depends on
(A) Frequency of incident light and moment of inertia of the molecule
(B) Moment of inertia of the molecule only
(C) Frequency of incident light only
(D) Neither moment of inertia nor the frequency of light
10- Pure rotational spectrum of diatomic molecules consists of
(A) two equally spaced spectral lines
(B) three equally spaced spectral line
(C) three unequally spaced spectral lines
(D) many equally spaced lines
ANSWERS:
1-(D), 2-(A), 3-(A), 4-(D), 5-(D), 6-(C), 7-(C), 8-(C), 9-(B), 10-(D)