B.TechSemester 12024-25Engineering PhysicsBAS101

Engineering Physics (BAS101) - AKTU Question Paper 2024-25

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 2024-25. 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:2024-25

University:AKTU / UPTU

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Questions Asked in 2024-25

Engineering Physics (BAS101) — complete question paper · 70 marks · 3 Hours

Section AAttempt all questions in brief. 2 x 07 = 14

a
State the assumptions made by t he Planck’s to explain black bo dy radiation curve
b
Describe the term wave packet in Quantum Mechanics
c
Explain the term skin depth with necessary formulae
d
Centre is dark in Newton’s rings experiment. Explain it
e
Differentiate Spontaneous Emiss ion and Stimulated Emission
f
State the formula to calculate the cut of parameter and Number of modes in the fiber
g
Discuss the term Quantum Well and Quantum Wire

Section BAttempt any three of the following: 07 x 3 = 21

a
Derive Schrodinger’s time ind ependent wave equation for a fr ee particle and give the physical interpretation of wave function
b
Derive electromagnetic wave equation in free space. Prove th at electromagnetic wave propagates with speed of light
c
Explain interference in thin films due to reflected light of uniform thickness and obtain the condition of bright and dark rings
d
Explain the process of absorption of radiation, spontaneous emission and stimulated emission with diagram. Show that
e
Explain type I and II superconductors. For a specimen of superconductor, the critical fields are 1.4 x 105 and 4.2 x 105 A/m for temperature 14K and 13K respectively. Calculate the transition temperature and fields at 0 K and 4.2 K

Section CAttempt any one part of the following: 07 x 1 = 07

a
Describe the experiment of Da visson and Germer to demonstrat e the wave character of electrons
b
A particle is moving in one dimensional potential box (of in finite height) of width 20 Å. Calculate the probability of finding the particl e within an interval of 10 Å at the centre of the box when it is in its sta te of least energy
a
Derive work-energy theorem for the flow of energy in an electromagnetic field
b
Assuming that all the energy from a 1000 watt lamp is radiat ed uniformly; calculate the electri c field and magnetic field of r adiations at
a
distance of 5m from the lamp
a
Discuss the phenomenon of Fr aunhofer diffraction at a single slit. Show that the intensity of first subs idiary maximum is about 4.5% of t h e principal maximum
b
A parallel beam of sodium li ght of wavelength 5880 Å is inci dent on a thin glass plate of refractive index 1.5 such that the angle of refraction in plate is 60 o. Calculate the smallest thic kness of the plate, which will make it appear dark by reflection
a
Explain the term acceptance angle, acceptance cone and numer ical aperture of an optical fiber with labelled diagram and derive e xpression for numerical aperture in terms of relative refractive index difference
b
Explain the construction and wo rking of He-Ne laser with pro per- labelled diagram
a
Discuss Meissner effect. Show that perfect diamagnetism and zero resistivity are two independent and essential properties of the superconductor
b
Explain the term top-down approach for the fabrication of na no- materials. Describe CVD method fo r the synthesis of nano-materi als with a suitable diagram

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.