Physics Ii

B. E. 2nd Semester (D-Scheme) Examination PHYSICS-II Paper-PHY -102-D Maximum Marks: 100 Time allowed: 3 hours Note: Attempt five questions in all, selecting at least two from each Part. All questions carry equal marks. Part-A 1. (a) Write down and prove Maxwell's equations and also give their word statements.

15

(b) What do you mean by equation of continuity?

5

2. (a) Explain the electrical oscillations produced by the charging of a capacitor through an inductor and a resistoL 15 (b) Discuss the salient features of time varying magnetic field.

5

3.(a) Explain Hall effect and discuss its importance.

10

(b) Derive and discuss Poynting vector.

10

4. (a) Explain Heisenberg uncertainty principle with the help of an experimental illustration.

10

(b) What are orthogonal and nonnal wave functions? 5 (c) With the help of uncertainty principle, calculate the time required for the atomic system to retain rotational energy for a line of wavelength 6000 A 0 and width 10-4 N. :)

320-100-P-2-(Q-8) (03) (Ex. 1,400)

P.T.o.

8.

f

i

(2)

Part-B

s. (a) (b)

6. (a)

Explain Bragg's law and describe powder method for crystal analysis. 12 What is Ewald construction? Discuss its importance in crystallography.

8

What are reciprocal lattices? Establish the relationship between direct lattice vectors and reciprocal Iatric vectors. 12

(b) Explain Einstein model of lattice heat capacity and discuss its SUCcess and failure. 7. (a)

What is Fermi energy ? Find the expression of temperature dependence semiconductor. 14

(b)

8

for

it

in

intrinsic

Explain Meissner effect. 6·

9.

Write notes on the fOllowing: (a)

Point defects

(b) BraVais lattices (c)

7

Brillouin zones.

7 6

320-100 (Ex. 1,400)

I f I I

f

I i ~.

f

10.

t

t (2)

Part-B S. (a)

(b)

6. (a)

Explain Bragg's law and describe powder method for crystal analysis. 12 What is Ewald construction? Discuss its importance in crystallography.

8

What are reciprocal lattices ? Establish the relationship between direct lattice vectors and reciprocal Iattic vectors. 12

(b) Explain Einstein model of lattice heat capacity and discuss its SUCcess and failure. 7. (a)

What is Fermi energy ? Find the expression of temperature dependence semiconductor. 14

(b)

8

for

it

in

intrinsic

Explain Meissner effect. 6·

8.

Write notes on the fOllowing: (a)

Point defects

(b) BraVais lattices (c)

7

Brillouin zones.

7 6

320-100 (Ex. 1,400)

t

r

I

, I

f

I i

t