ENGINEERING PHYSICS — Major (End Semester) 2026 question paper

Paper details

• Subject: ENGINEERING PHYSICS (BSM-131)
• Branch: Information Technology
• Semester: 1
• Exam: Major (End Semester) 2026
• Questions: 24

Questions asked in ENGINEERING PHYSICS Major (End Semester) 2026

1. Q1. Attempt any Five parts of the following. (Unit I & II)
2. Q1(a). Show that the ratio of the intensities in a Fraunhofer diffraction phenomenon from a single slit can be given by I₀ : I₁ : I₂ : .......... = 1 : 0.045 : 0.016 : .......... [2 marks]
3. Q1(b). Define polarization of light and explain it using appropriate neat and clean diagram. What do you mean by linearly, circularly and elliptically polarized light? Explain. [2 marks]
4. Q1(c). Write down de Broglie hypothesis and explain it. What will be the ratio of de Broglie wavelengths of an electron and a neutron, if both have the same kinetic energy? [2 marks]
5. Q1(d). Derive time dependent Schrodinger equation. Explain the physical significance of wave function giving one appropriate example. Write energy and momentum operators and explain their significance. [2 marks]
6. Q1(e). Describe Davission-Germer experiment with the help of neat and clean diagram. How could it prove the wave nature of kinetic electrons? [2 marks]
7. Q1(f). A hydrogen atom is 5.3 × 10⁻¹¹ m in radius. Use the uncertainty principle to estimate the minimum energy an electron can have in the atom? [2 marks]
8. Q1(g). Show that the ratio of energies of a particle trapped in a one dimensional box is 1:4:9...... [2 marks]
9. Q2. Attempt any Two parts of the following. (Unit-III)
10. Q2(a). Write down Maxwell's electromagnetic equations in integral and differential forms for free space and explain their physical significance. [5 marks]
11. Q2(b). Derive the wave equation for an electromagnetic wave and show that the electromagnetic waves travel with a constant speed c (3 × 10⁸ m/s). [5 marks]
12. Q2(c). Derive the first and second Maxwell equations and explain their physical significance. [5 marks]
13. Q3. Attempt any Two parts of the following. (Unit-III)
14. Q3(a). Derive [5 marks]
15. Q3(b). Write down the statement of Poynting theorem and explain the physical significance of the terms in it. If a radio transmitter emits an electromagnetic wave with electric field 3 V/m and a magnetic field of 2 μT, calculate the magnitude of the Poynting vector at a point where the angle between the electric and magnetic fields is 45°. [5 marks]
16. Q3(c). Show that [5 marks]
17. Q4. Attempt any Two parts of the following. (Unit-IV)
18. Q4(a). I. Write a comment on intrinsic and extrinsic semiconductor. How do their conducting properties differ with each other, explain. II. Write a comment on direct and indirect bandgap semiconducting material and explain with the help of neat and clean diagram. Give one example of each. [5 marks]
19. Q4(b). Define superconductivity and account reasons for its origin? Briefly explain on the basis of BCS theory. Classify superconductors as Type-I and Type-II superconductors and explain the difference in their magnetic properties. [5 marks]
20. Q4(c). Derive London first and second equations for superconductivity and explain their physical significance. [5 marks]
21. Q5. Attempt any Two parts of the following. (Unit-IV)
22. Q5(a). Explain the origin of bandgaps in silicon with the help of neat and clean diagram. [5 marks]
23. Q5(b). The critical field for niobium is 1 × 10⁵ amp/m at 8 K and 2 × 10⁵ amp/m at absolute zero. Find the transition temperature of the element. [5 marks]
24. Q5(c). Classify nanomaterials on the basis of their dimensions and give one appropriate example of each. Write down five potential applications of nanomaterials. [5 marks]