iare.ac.in B.Tech Engineering Physics Previous Question Paper : Institute Of Aeronautical Engineering
Name of the Organisation : Institute Of Aeronautical Engineering
Exam : B.Tech Semester Examinations
Subject : Engineering Physics
Semester : 1
Document Type : Previous Question Paper
Website : https://www.iare.ac.in
B.Tech Semester -1 Engineering Physics Question Papers
IARE B.Tech Engineering Physics Previous Question Paper Semester 1 for the year 2021.
Related / Similar Question Paper : iare.ac.in B.Tech Chemistry & Linear Algebra Calculus Previous Question Paper
B.Tech Semester -1 Engineering Physics Questions
MODULE – I
1. (a) Enumerate the application of Schrodinger wave equation in one-dimensional potential well. [7M]
(b) Calculate the velocity and kinetic energy of an electron having wavelength of 0.21nm. [7M]
MODULE – II
2. (a) What are acceptor type of impurities and what is a P-type semiconductor? Explain how phosphorous atoms donate electrons to the conduction band. [7M]
(b) The intrinsic carrier density at room temperature in Ge is 2.37×1019/m3. If the electron and hole mobilities are 0.38 and 0.18m2V−1s−1 respectively. Calculate the resistivity. [7M]
MODULE – III
3. (a) Discuss the different mechanisms involved to produce laser emission. [7M]
(b) The CO2 laser is one of the most powerful lasers. The energy difference between the two levels is 0.117eV. Determine the frequency and wavelength of radiation. [7M]
4. (a) Explain the different types of optical fibers and their properties. [7M]
(b) Draw the conditions for the light propagation through optical fibers and hence explain the following terms
i) Critical incident angle ii) Acceptance angle iii) Numerical aperture. [7M]
MODULE – IV
5. (a) Explain how Newton’s rings are formed and describe the method for the determination of wavelength of light with their use. [7M]
(b) In Young’s double slit experiment the separation of the slits is 1.9 mm and the fringe spacing is 0.31 mm at a distance of 1 metre from the slits. Calculate the wavelength of light.
6. (a) Describe and explain the Fraunhofer single diffraction pattern obtained with a narrow slit and illuminated by a parallel beam of monochromatic light. [7M]
(b) Calculate the least width of a plane diffraction grating having 500 lines/cm, which will just resolve in the second order the sodium lines of wavelengths 5890 A0 and 5896A0. [7M]
MODULE – V
7. (a) Derive the differential equation of a damped harmonic oscillator and discuss the different cases of damping. [7M]
(b) Deduce the expression for the velocity of transverse waves on a long stretched string. [7M]
8. (a) What do you understand by wave motion? What are transverse and longitudinal waves? Give examples of each. [7M]
(b) A massless spring of spring constant 10Nm−1 is suspended from a rigid support and carries a mass of 0.1kg at its lower end. The system is subjected to a resistive force pv, where p is a constant and v is the velocity. It is observed that the system performs damped oscillatory motion and its energy decays to 1/e of its initial value is 50s.
i) What is the value of p?
ii) What is the Q value of the oscillator? [7M]
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