Engineering Physics (BT-201) - Important Questions

State and explain Heisenberg's uncertainty principle in detail with suitable illustration and its physical significance.

Derive the energy eigenvalues and normalized wave functions for a particle confined in a one-dimensional box of length L.

Explain the construction and working principle of the Mach-Zehnder interferometer with a suitable ray diagram and mention its applications.

Explain the construction and working of Michelson's interferometer with labelled diagram, including types of fringes formed.

Explain the variation/shifting of Fermi level in N-type semiconductors with doping concentration and temperature.

What is Hall effect? Derive an expression for Hall coefficient and Hall voltage.

Explain the construction and working of He-Ne laser with neat diagram and energy level transitions.

Explain the construction and working of CO2 laser with energy level diagram.

Starting from the principle of charge conservation, derive the equation of continuity for current density, stating assumptions, and explain its significance.

Write a note on the different types of polarization in dielectric materials.

Derive both the time-dependent and time-independent Schrodinger wave equations for a wavefunction.

Explain the formation of Newton's rings and derive the expression for the diameters of dark and bright fringes for determination of wavelength of light.

What is a Zener diode? Discuss its construction, working and I-V characteristics.

What are Einstein's A and B coefficients? Define them and derive the relationship between Einstein A and B coefficients.

What is LASER? Explain the properties of LASER light: monochromaticity, coherence, directionality and brightness.

Derive the expression for the acceptance angle and numerical aperture of an optical fiber and calculate the acceptance angle for given core and cladding refractive indices.