MORE IN Applied Physics 1
MU First Year Engineering (Semester 1)
Applied Physics 1
May 2014
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Sove any five from the following :-
1 (a) What is x-rays? Why the x-ray are prefered to study crystaline solid.
3 M
1 (b) Represent the following in the cubic unit cell (021), (123), 
3 M
1 (c) Find the miller indices of a set of parallel panes which makes intercepts in the ratio 3a:4b on the x and y axes and parallel ti Z-axis
3 M
1 (d) What is Fermi level and Fermi energy? Write Fermi-Dirac distribution function.
3 M
1 (e) Explain the concept of hole in a semiconductor
3 M
1 (f) Draw the structure of quartz crystal and explain its various axes.
3 M
1 (g) State and explain ohm's law in magnetic circuit?
3 M

2 (a) Describe the formation of energy band in solid? Explain how it helps to classify the solid in to conductors, insulator and semiconductor with proper diagram.
8 M
2 (b) Explain Dimond crystal structure with proper diagram and determine its APF?
7 M

3 (a) Derive the Bragg's law and describe the powder method to determine crystal structure of powdered specimen.
8 M
3 (b) The magnetic field strength of cooper is 1016 ampere / metre. And magnetic susceptibility is -0.8 x 10-3. Calculate magnetic flux density ad magnetisation in cooper.
7 M

4 (a) What is liquid crystal state of matter? Draw the diagram to descibe molecular arrangement in their different phases?
5 M
4 (b) Mention different types of polarizability in a dielectric? Explain electorinc polarizability?
5 M
4 (c) Calculate electron and hole concentration in intrinsic silicon at room temperature if its electrical conductivity is 4 x 10-4 mho/m. (mobility of electron = 0.14m2/v-s & mobility of hole =0.040 m2/v-s)
5 M

5 (a) Explain with neat diagram construction and working of solar cell.
5 M
5 (b) State the acoustic requirements of good auditorium. Explain how these requirements can be achieved.
5 M
5 (c) If the x-rays of wavelength 1.549 Ao will be reflected from crystal having spacing of 4.255 Ao, calculate the smallest glancing angle and highest order of reflection that can be observed.
5 M

6 (a) Explain with neat diagram Hysterisis effect in ferromagnetic material.
5 M
6 (b) Explain piezoelectric oscillator to produce USW?
5 M
6 (c) Explain the formation of barries potential in P-N Junction.
5 M

More question papers from Applied Physics 1