B.TechSemester 12022-23Engineering PhysicsBAS-101

Engineering Physics (BAS-101) - AKTU Question Paper 2022-23

B.Tech · Semester 1 · Free PDF Download

This is the official AKTU Engineering Physics Previous Year Question Paper for B.Tech Semester 1, academic session 2022-23. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 1

Session:2022-23

University:AKTU / UPTU

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Questions Asked in 2022-23

Engineering Physics (BAS-101) — complete question paper

Section AAttempt all questions in brief. 2 x 7 = 14

a
Write down the Planck’s expression (formula) for spectral energy density in Black Body radiation. d`f’.kdk fofdj.k esa o.kZØeh; ÅtkZ ?kuRo ds fy, IySad dk lw= fyf[k,A
b
What do you understand by phase velocity and group velocity of waves? rjaxks ds Qst osx ,oa lewg osx ls D;k vfHkizk; gS?
c
Write down the expression for Continuity Equation in differential form. lrr lehdj.k ds O;atd dks vody :i esa fy[ksaA
d
What do you understand by coherent sources?
e
Define the population inversion in LASER
f
Write down any two applications of the Nano materials
g
State any two differences between single mode and multi-mode step index fiber

Section BAttempt any three of the following: 7 x 3 = 21

a
Explain the physical significance of wave function given by Max Born
b
What do you understand by Displacement current and skin depth?
c
What do you understand by the phenomenon of Fraunhofer differaction. Find out the ratio of intensities of successive secondary maxima compared to the intensity of the principle maximum
d
Describe briefly any three applications of optical fiber
e
Explain Type I and Type II superconductors briefly

Section CAttempt any one part of the following: 7 x 1 = 7

a
Derive an expression for Compton wavelength shift (∆λ) for a Compton scattering experiment. The wavelength of an X-ray photon is doubled on being scattered through 90°with a carbon block in a Compton Experiment. Find out the wavelength of the incident photon. (Electron mass 𝑚௘ = 9.1 × 10ିଷ𝑘𝑔, Planck’s constant ℎ = 6.63 × 10ିଷସ𝑚ଶ𝑘𝑔/𝑠, speed of light 𝑐 = 3.0 ×
b
Derive time independent Schrodinger wave equation. Write down the time independent Schrodinger equation for a particle in one-dimensional box (infinitely deep potential well) and find out energy eigenvalues (energy levels) and the corresponding energy eigenfunctions (normalized wavefunctions) of the particle
a
Derive equation for simple plain electromagnetic wave starting from Maxwell’s equations in free space. Show that the electromagnetic wave in free space is transverse in nature
b
Prove the Poynting theorem in electrodynamics and explain the physical significance of each of the term appearing in the final expression of the theorem
a
(i) Describe the phenomenon of interference in thin film (uniform thickness) due to reflected light and write down the conditions for constructive and destructive interference. (ii) A light source of wavelength 6000 Ȧ is used along with plano-convex lens with radius of curvature equal to100cm in a Newton’s ring arrangement. Find out the diameter of the 15th dark ring
b
Explain briefly the Rayleigh criterion of resolution. Discuss the resolving power of plane transmission grating and find the relation between resolving and dispersive power of the grating
a
(i) Find out the expressions for acceptance angle and numerical aperture of an optical fiber in terms of the refractive index of core and cladding. (ii) Explain briefly the attenuation in optical fiber
b
Describe the absorption, spontaneous emission, stimulated emission of radiation by matter and derive the relation between Einstein’s Coefficients related to three phenomena
a
Explain the Meissner effect and persistent current in superconductivity
b
What are Nano materials? Explain briefly the basic concepts of Quantum Dots, Quantum wires and Quantum well

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — BAS-101

Questions that appeared in more than one session, found by comparing 4 years of Engineering Physics papers (2022-23, 2023-24, 2024-25, 2025-26)

Define the population inversion in LASER

Appeared in: 2022-23 · 2025-26

Explain Type I and Type II superconductors briefly

Appeared in: 2022-23 · 2025-26

Engineering Physics — Other Year Papers

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