Rajasthan Technical University 2009 B.C.A Computer Application University of Rajasthan (SEMICONDUCTOR PHYSICS, ELECTRONIC DEVICES AND CIRCUITS ) - Question Paper

Bachelor of computer applications (part I)

Examination, 2009

Paper 112

SEMICONDUCTOR PHYSICS, ELECTRONIC DEVICES AND CIRCUITS

Q1. (a) What is Bohar's quantum condition for angular momentum of electron in an atom?
Write the name of symbols used in the condition.
(b) provide 5 examples of covalent bonding.

Q2. (a) elaborate the characteristics of a semiconducator? What do you mean by depletion layer in a p-n junction?
(b) Classify every of the subsequent as n-type or p-type semiconducators :
(i) Doped by acceptor atoms
(ii) Crystal with pentavalent impurities
(iii) Majority carriers are holes
(iv) Minority carriers are free electrons
(v) Donor atoms were added to crystal.

Q3. (a) describe mobility and electrical conductivity and provide their SI units.
(b) Draw an energy level diagram showing the donor and acceptor energy levels with respect to valence and conducion bands.

Q4. explain the V-I characteristics of a tunnel diode and write its applications.

Q5. (a) Derive an expression for ripple factor for a full-wave rectifier.
(b) explain the role of L part filter.

Q6. (a) Write elementary info about Thyristors and display devices.
(b) discuss bipolar transistor action.

Earning:   Approval pending.