BABSc, B.Com & BCA Questions _III - Nalanda Open University

Nalanda Open University
Annual Exam-2010,
Bachelor of Science (Physics) Hons, Part-III
Paper-VIII
Time: 3 Hrs Full Marks: 75
Answer any FIVE questions. All questions are of equal marks.
1. Copper has fce structure and the atomic radius is 0.1278 nm. Calculate the
interplanar spacing for (111) and (321) planes.
2. Discuss Van der Waals binding. On the basis of the theory find the total potential
energy for the Crystal of N atoms.
3. Explain Hall effect. Determine Hall coefficient. Give its importance
4. What is Drude-Lorentz theory? Derive Wiedemann Franz relation.
5. State and prove
(a) Thevenin's theorem
(b) Norton's theorem.
6. What do you mean by a filter circuit? How are they classified in accordance with
their Selectivity Characteristics? Describe the elementary filter theory.
7. What are p-type and n-type semiconductors? How is a p-n junction formed?
Discuss how a potential barrier develops at the junction.
8. What is a photodiode? Discuss its working, characteristics and uses.
9. Explain the principle of Frequency modulation. Define Frequency deviation and
the modulation index for frequency modulated carrier.
10. (a) What is the difference between XOR gate and OR gate?
(b) Show that NAND and NOR gates are Universal gates.
κ κ κ
vko';d lwpuk
ch0,l0lh0 HkkSfrdh ¼izfr"Bk½ r`rh; o"kZ ds lHkh ijh{kkfFkZ;ksa dks
lwfpr fd;k tkrk gS fd vkids iwoZ fu/kkZfjr ¼lkekU; v/;;u½
ijh{kk ds dk;ZØe esa vkaf'kd ifjorZu fd;k x;k gS] tks fuEuor~
gS%&
frfFk izfr"Bk dk fo"k; le; ijh{kk dk fo"k;
25-02-2010
HkkSfrdh ¼izfr"Bk½ 12 cts ls 3 cts
vijkg~u
lkekU; v/;;u
¼th0,l0½