STUPIDSID
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), [121]
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
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