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[B19 BS 1104]
I B. Tech I Semester (R19) Regular Examinations
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APPLIED PHYSICS
(Electrical & Electronics Engineering)
MODEL QUESTION PAPER
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TIME: 3 Hrs. Max. Marks: 75
Answer ONE Question from EACH UNIT
All questions carry equal marks
CO |KL | M
UNIT -1
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- a). Explain the principle of Superposition and discuss the conditions for maxima and minima of intensity.
b). How are Newton’s Rings formed and deduce an expression for the wavelength of light used.
OR
- a). Distinguish the different diffractions of light.
b). Give qualitative and quantitative analysis of Fraunhofer diffraction at a single slit
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UNIT - II
- a). Define polarization and explain the different types of polarization possible in a dielectric
b). Deduce the Claussius Mosotti equation and its significance in dielectrics.
OR
- a). Define Magnetic susceptibility and give a classification of magnetic materials.
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b). Describe the Hysteresis exhibited by Ferromagnetic materials and explain it using a Suitable theory
UNIT - III
- a). Give the selection procedure of the active medium of laser device.
b). With suitable diagrams, discuss the working principle, design and working of He — Ne laser system
OR
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- a). What is the significance of Numerical Aperture of an optical fiber and obtain an expression for it.
b). Discuss the sensor applications of optical fiber.
UNIT - IV
- a). What is an intrinsic semiconductor and obtain an expression for the density of coiners.
b). Distinguish between direct and indirect band gap semiconductors and mention their applications.
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OR
- a). Discuss the Hall Effect in detail and explain its significance.
b). Distinguish between drift and diffusion current in semiconductors.
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UNIT -V
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- a). Explaining Magnetostriction effect, describe how ultrasonics can be produced.
b). Mention the application of ultrasonics.
OR
- a). How can nano materials be produced by the sol-gel method?
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c). Discuss some important applications of nanomaterials.
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