Questions with Complete Solutions - Hamro CSIT

Consider a copper wire of cross-sectional area \(1 \,\text{mm}^2\) carrying a current \(1\,\text{A}\). What is the drift velocity of the electrons? Cu is monovalent, that is, there is one free electron per atom. The density and molecular weight of Cu are \(9\,\text{g/cc}\) and \(64\,\text{g/mole}\), respectively. \hfill

Not Answered First Semester Asked on 2081 Exam

The uncertainty in the position of a particle is equal to the size of the de Broglie wavelength of the particle. Calculate the uncertainty in the velocity of the particle in terms of the velocity of the de Broglie wave associated with the particle.

Not Answered First Semester Asked on 2081 Exam

An electron is placed midway between two fixed charges, $q_1 = 2.5 \times 10^{-10}\text{ C}$ and $q_2 = 5 \times 10^{-10}\text{ C}$ . If the charges are $1\text{ m}$ apart, what is the velocity of the electron when it reaches a point $10\text{ cm}$ from $q_1$ ?

Not Answered First Semester Asked on 2081 Exam

Suppose the body of an ice skater has a moment of inertia $4\text{ kgm}^2$ and her arms have a mass of $5\text{ kg}$ each with the center of mass at $0.4\text{ m}$ from her body. She starts to turn at $0.5\text{ rev/s}$ on the point of her skate with her arms outstretched. She then pulls her arms inward so that their center of mass is at the axis of her body. What will be her speed of rotation?

Not Answered First Semester Asked on 2081 Exam

Explain Bloch theorem for a particle moving in a periodic potential.

Not Answered First Semester Asked on 2081 Exam

Discuss electrical conductivity of a semiconductor.

Not Answered First Semester Asked on 2081 Exam

Develop differential equation for the oscillation of a mass-spring system and write its solution.

Not Answered First Semester Asked on 2081 Exam

Explain potential energy barriers for the charge carriers in BJT. Describe how the transistor works as a voltage amplifier.

Not Answered First Semester Asked on 2081 Exam

What are the postulates of wave mechanics? Derive Schrodinger wave equation. Discuss significance of the wave function.

Not Answered First Semester Asked on 2081 Exam

Define the terms critical potential, excitation potential and ionization potential. Describe Frank-Hertz experiment for determining the critical potentials. Show how the results of the experiment confirm Bohr’s postulates.

Not Answered First Semester Asked on 2081 Exam

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