B.TechSemester 12023-24Engineering PhysicsBAS101

Engineering Physics (BAS101) - AKTU Question Paper 2023-24

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 2023-24. 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:2023-24

University:AKTU / UPTU

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Questions Asked in 2023-24

Engineering Physics (BAS101) — extracted question text · 70 marks · 3 Hours

Section AAttempt all q u e s t i o n s i n b r i e f . 2 x 7 = 1 4

a
Explain basic postulates of Plank’s law of radiation
b
Write down the physical significance of Poynting vector?
c
What happens if the slit is sma ller than wavelength in diffraction pattern?
d
What is metastable state? Discuss their role in laser action
e
What is vortex state of a superconductivity?
f
What do you mean by scattering loss in optical fiber?
g
Explain quantum confinement effect in nanomaterials?

Section BAttempt any three o f t h e f o l l o w i n g : 7 x 3 = 2 1

a
Calculate the Compton shift a nd kinetic energy of recoil electron if X-rays of wavelength 1.0A0 are scattered form a carbon block. The scattered radiation is viewed at 900 to the incident beam
b
Assuming that all the energy fro m a 1000-Watt lamp is radiated uniformly; calculate the average values of the intensities of electric and magnetic fields of radiation at a distance of 2 m from the lamp
c
Newton’s rings are observed normally in reflected light of wav elength 6000 A0. The diameter of the 10th dark ring is 0.50cm. Find the radius of curvature of lens and thickness of the film
d
Diffraction pattern of a single slit of width 0.5 cm is found b y a lens of focal length 40 cm. calculate the distance between first dark and next bright fring e from the axis. Given wavelength 4890A0
e
Calculate the V- number for a fiber of core diameter 40μm & RI of 1.55 and 1.50 respectively for its core & cladding when a light of wavelength 1400nm is propagating. Also calculate the number of modes that the fiber can support for the propagation

Section CAttempt any one p a r t o f t h e f o l l o w i n g : 7 x 1 = 7

a
Distinguish between phase velocity and group velocity of a w ave packet and establish the relation between them
b
Find an expression for the ener gy state eigen value and wave function of a particle in one dimensional box
a
What is Maxwell fourth equation modifying on the basic of displ acement current. When an ideal capacitor is charged by a dc battery, no current flows. H owever, when an ac source is used, the current flows continuously. How does one explain this , based on the concept of displacement current?
b
Derive the Poynting or work-energy theorem for the flow of e nergy in an electromagnetic field. Also give the physical interpretation
a
Discuss the phenomenon of interference of light due to paral lel thin films and find the condition of maxima and minima. Show that the interference patt erns of reflected and transmitted source of light are complementary
b
Discuss single slit Fraunhofer diffraction and show that the relative intensities of successive maximum are nearly 1: 1/22: 1/62: 1/121
a
Explain acceptance angle and acceptance cone of optical fibe r. Derive expression for them
b
Draw a neat diagram of He-Ne laser and describe its method o f working? How is it superior to
a
What is the difference between Type 1 and Type 2 semiconductors ? Why type-2 superconductors are more important than type 1 superconductor?
b
What is the purpose of Nano science? Discuss any one method ( CVD/Sol-Gel) for the synthesis of nanomaterials

Question text is extracted from the official AKTU question paper PDF above. Check the original PDF for equations, diagrams and complete wording. Extracted: 2026-08-23.

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