BT-201 (GS) – Engineering Physics

B.Tech. I & II Semester
Examination, December 2022
Grading System (GS)
Max Marks: 70 | Time: 3 Hours

Note:
i) Attempt any five questions.
ii) All questions carry equal marks.

Previous Year Questions

Q.1 a) Explain the Heisenberg's uncertainty principle in detail.
b) Deduce the relation between phase and group velocities.

Answer of (a): To be posted here!


Answer of (b): To be posted here!

Q.2 a) Obtain the time independent Schrodinger wave equation.
b) How the Newton's rings are formed? Deduce the expression for diameter of dark and bright fringes.

Answer of (a): To be posted here!


Answer of (b): To be posted here!

Q.3 a) Describe the construction and working of Mach-Zehnder interferometer.
b) Explain about the diffraction grating. A parallel beam of Sodium light incident on plane transmission grating having 4250 lines per centimeter and a second order spectral line is observed at an angle of 30°. Find the wavelength of Sodium light.

Answer of (a): To be posted here!


Answer of (b): To be posted here!

Q.4 a) What is P-N junction diode? Discuss its I-V characteristics.
b) Explain the construction and working of solar cell with neat diagrams.

Answer of (a): To be posted here!


Answer of (b): To be posted here!

Q.5 a) Derive an expression for Hall coefficient and Hall voltage.
b) Derive the relationship between Einstein A and B coefficients.

Answer of (a): To be posted here!


Answer of (b): To be posted here!

Q.6 a) Explain the construction and working of He-Ne laser.
b) Explain the numerical aperture of an optical fiber. Calculate the numerical aperture of a fiber with refractive indices of core and cladding are 1.55 and 1.50, respectively.

Answer of (a): To be posted here!


Answer of (b): To be posted here!

Q.7 a) State and explain Stoke's and Gauss theorem.
b) Derive Maxwell equations in vacuum.

Answer of (a): To be posted here!


Answer of (b): To be posted here!

Q.8 Write short notes on any two:
a) Physical significance of wave function
b) Young's double slit experiment
c) Bloch's theorem
d) Properties of Laser Light

Answer: To be posted here!