Download JNTUK B-Tech 2020 R19 ECE 1203 Applied Physics Model Question Paper

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[B19 BS 1203]

I B. Tech II Semester (R19) Regular Examinations

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APPLIED PHYSICS

(Electrical & Electronics Engineering)

MODEL QUESTION PAPER

TIME: 3 Hrs. Max. Marks: 75 M

Answer ONE Question from EACH UNIT

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All questions carry equal marks

UNIT -1

1. a). Explain the principle of Superposition and discuss the conditions for maxima and minima of intensity. (1 2 8)
   

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   b). How the Newton’s Rings are formed and deduce an expression for the wave length of light used. (1 2 7)

OR

1. a). Distinguish the different diffractions of light. (1 2)
   b). Give qualitative and quantitative analysis of Fraunhofer diffraction at a single slit (1 3 10)

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UNIT - II

1. a). Define polarization and explain the different types of polarization possible in a dielectric (2 2 7)
   b). Deduce the Claussius Mosotti equation and its significance in dielectrics. (2 3 8)

OR

1. 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 (2 3 10)

UNIT - III

1. a). Give the selection procedure of the active medium of laser device. (4 2 7)
   b). With suitable diagrams, discuss the working principle, design and working of He — Ne laser system (4 2 8)

OR

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1. a). What is the significance of Numerical Aperture of an optical fiber and obtain an expression for it. (4 2 8)
   
   b). Discuss the sensor applications of optical fiber. (4 3 7)

UNIT - IV

1. a). What is an intrinsic semiconductor and obtain an expression for the density of coiners. (3 2 9)
   

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   b). Distinguish between direct and indirect band gap semiconductors and mention their applications. (3 3 6)

OR

1. a). Discuss the Hall Effect in detail and explain its significance. (3 3 9)
   b). Distinguish between drift and diffusion current in semiconductors. (3 2 6)

UNIT - V

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1. a). Explaining Magnetostriction effect, describe how the ultrasonics can be produced. (4 3 9)
   b). Mention the application of ultrasonics. (4 1 6)

OR

1. a). How the nano materials can be produced by sol — gel method. (5 2 7)
   b). Write about Carbon Nanotubes (5 2 4)
   

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   C). Discuss some important applications of nanomaterials. (5 1 4)

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