Docsity
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Docsity AI
Docsity AI
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

Physics end-sem (2021-22), Exams of Physics

Delhi Technological UniversityPhysics

end semester examination first year ( second semester) Ap 102 (physics-2) Delhi technological university

Typology: Exams

2020/2021

Available from 08/06/2022

kratham001
kratham001 🇮🇳

6 documents

1 / 4

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
SECOND SEMESTER BTECH.
END SEMESTER EXAMINATION
AP 102
PHYSICS II
Time: 3:00hr
Q1. [a] Write down time-dependent form of Schrodinger
equation. Use this to obtain time-independent form of
Schrodinger equation. (4)
[b] What do you mean by matter wave? Show that a
moving particle is equivalent to a wave packet rather than a
single wave. (4)
Q2. [a] Derive the equation that represents Poynting's
theorem. What is its physical significance?
(4)
[b] A conducting medium of conductivity 5.0 mhos/m and
dielectric constant 1.0 is placed in an external electric field
E = 250 sin(10/01). Find the conduction and displacement
current densities in the medium. Estimate the frequency at
pf3
pf4

Partial preview of the text

Download Physics end-sem (2021-22) and more Exams Physics in PDF only on Docsity!

SECOND SEMESTER BTECH.

END SEMESTER EXAMINATION

AP 102

PHYSICS II

Time: 3:00hr Q1. [a] Write down time-dependent form of Schrodinger equation. Use this to obtain time-independent form of Schrodinger equation. (4) [b] What do you mean by matter wave? Show that a moving particle is equivalent to a wave packet rather than a single wave. (4) Q2. [a] Derive the equation that represents Poynting's theorem. What is its physical significance? (4) [b] A conducting medium of conductivity 5.0 mhos/m and dielectric constant 1.0 is placed in an external electric field E = 250 sin(10/01 ). Find the conduction and displacement current densities in the medium. Estimate the frequency at

which both the current densities will be equal. (80= 8.85 x 10 -12 F/m). (4) Q3. [a] Write Maxwell-Boltzmann molecular speed distribution formula. Use this to obtain the expressions for most probable speed, average speed and root mean square (rms) speed. Also, verify that rms speed of an ideal-gas molecule is about 9 % greater than its average speed. (4) [b] A gas has only two particles, a and b. Show with the help of diagrams how these two particles can be arranged in the three quantum series 1, 2 and 3 using (i) Maxwell-Boltzmann (ii) Fermi-Dirac (iii) Bose-Einstein statistics. (4) Q4. [a] Distinguish clearly the Maxwell-Boltzmann, Bose- Einstein and Fermi- Dirac statistics. (4) [b] Calculate the Fermi energy (in eV) for sodium, assuming that it has one free electron per atom. (Density of sodium = 0.97 g/cm", atomic weight of sodium = 23). (4)

[b] What is Einstein's relation in semiconductor physics? A semiconductor has a hole diffusion coefficient of 20 cm°/s. Estimate the hole mobility at room temperature (300 K). (k = 1.38x10-23 J/K). (4) ----END----