Engineering Physics SPPU Endsem Question Paper May 2024
All 9 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.
- Subject code
- 107002
- Pattern
- 2019 pattern
- Exam
- Endsem
- Session
- May 2024
- Max. marks
- 70
- Time
- 2½ Hours
- Semester
- I/II
- Paper code
- [6260]-2
Printed for: F.E. (Common)
Instructions to the candidates
- Q. 1 is compulsory. Answer Q2 or Q3, Q4 or Q5, Q6 or Q7, Q8 or Q9.
- Figures to the right indicate full marks.
- Neat diagram must be drawn wherever necessary.
- Use of non-programmable Electronic pocket calculator is allowed.
- Assume suitable data, if necessary. Physical Constants:
- Plank’s constant, h = 6.63 × 10 -34 J.S
- Mass of electron, m e = 9.1 × 10 -31 kg
- Charge on electron = 1.6 × 10 -19 C
Questions
Q1
- [10]
Write the correct option with answers for the following questions (1mark each)
- a)
De Broglie wavelength for matter waves associated with a matter particle is ________its Energy. i) Inversely proportional to square of ii) Directly proportional to iii) Inversely proportional to the square root of iv) Directly proportional to the square root of
- b)
A well behaved wave function satisfies which mathematical conditions. i) Finite ii) Single valued iii) Normalizable iv) All of the above
- c)
According to Heisenberg Uncertainty principle, in a narrow wave packet of de Broglie wavelength ______of a particle can be predicted correctly. i) Position ii) Momentum iii) Position and momentum both iv) Neither position nor momentum 2
- d)
This part has equations that don’t show as text. Open the PDF to read it.
- e)
The Hall effect is true for i) Semiconductors only and not metals ii) Metals only and not semiconductors iii) Both metals and semiconductors iv) Insulators
Also asked:May 2025
- f)
This part has equations that don’t show as text. Open the PDF to read it.
- g)
This part has equations that don’t show as text. Open the PDF to read it.
- h)
The expulsion of magnetic flux from within the superconductor below Critical temparature is know as i) Magnetic effect ii) Expulsion effect iii) Meissner effect iv) Josephson effect i) X rays or gamma rays are used in radiography testing technique due to which of their property. i) High frequency ii) High wavelength iii) High velocity iv) Low frequency j) A quantum dot (nanoparticle) has all dimensions in the range of i) 100 nm to 1 m ii) 1 - 100 nm iii) 1 m to 100 m iv) 100 m and above 3
Q2
- a)[6]
Derive schrodinger’s time independent equation.
Also asked:Feb 2026 ·Nov 2025 ·May 2025 ·Apr 2025 ·Nov 2024 ·Nov 2024 ·Nov 2023 ·May 2023 ·May 2022
- b)[5]
What is the Heisenberg uncertainty Principle/ Explain it using narrow and broad wave packets.
Also asked:May 2022
- c)[4]
The lowest energy of an electron trapped in a potential well is 4.2 eV. Determine the width of the potential well in AU.
OR- a)
Q3
- a)[6]
For a particle enclosed in a rigid box of infinite potential well, derive the equation for energy of the particle. Why is this energy quantized?
- b)[5]
What is the de Broglie hypothesis? Explain in brief properties of matter waves (any four).
Also asked:May 2025
- c)[4]
An electron is confined to a potential well of length 1.5 AU. Calculate the minimum uncertainty in its velocity (assume product of uncertainities equal to ‘h’).
- a)
Q4
- a)[6]
With a neat and labeled diagram explain the Hall effect. Derive expression for Hall voltage.
Also asked:Feb 2026 ·Nov 2025 ·May 2025 ·Apr 2025 ·Nov 2024 ·Nov 2023 ·May 2023 ·May 2022
- b)[5]
Difine Fermi level for a semiconductor. Draw a neat and labeled energy diagram for a PN junction diode showing Fermi levels when it is in (i) Zero bias (equilibrium) (ii) Forward bias
- c)[4]
This part has equations that don’t show as text. Open the PDF to read it.
OR- a)
Q5
- a)[6]
Derive the expression for electrical conductivity of a semiconductor. Discuss how this equation is modified for intrinsic, N-type and p-type semiconductors.
- b)[5]
Define efficiency of solar cell. Explain any four ways by which the efficiency of solar cell can be improved.
- c)[4]
This part has equations that don’t show as text. Open the PDF to read it.
- a)
Q6
- a)[6]
Differentiate between diamagnetic, paramagnetic and ferromagnetic materials. (Any three points).
- b)[5]
What is super conductivity? Explain any two applications of superconductors in brief.
- c)[4]
This part has equations that don’t show as text. Open the PDF to read it.
OR- a)
Q7
- a)[6]
What is the Meissner effect? Discuss the reason why it is observed? Showthat superconductors exhibit perfect diamagnetism below the critical temparature.
- b)[5]
Explain the process of recording and retrieving (reading) data in magnetic storage devices.
- c)[4]
This part has equations that don’t show as text. Open the PDF to read it.
- a)
Q8
- a)[6]
What is echo sounding? Using this technique, explain how ultrasonic waves can be used for flaw detection.
- b)[5]
What is quantum confinement? On its basis explain why nanoparticles exhibit different properties than corresponding bulk materials.
- c)[4]
State applications of nanotechnology in the field of electronics (any four). Explain any one application in brief.
Also asked:May 2023
OR- a)
Q9
- a)[6]
Explain optical and electrical properties of nanoparticles.
- b)[5]
State the objectives of Non-Destructive Testing. Differentiate between destructive and non-destructive testing (any two points).
- c)[4]
An ultrasonic pulse of frequency 100 kHz is sent through a block of aluminum with velocity 6320 m/s and. The echo is recorded after 1.45 microseconds. Calculate the thickness of the block and the wavelength of the ultrasonic pulse.
- a)