Register Number

SATHYABAMA UNIVERSITY

(Established under section 3 of UGC Act,1956)Course & Branch :B.E/B.Tech Common to ALL Branches

Title of the Paper :Applied Physics

Max. Marks :80

Sub. Code :SPHX1002

Time : 3 Hours

Date :30/05/2011

Session :FN

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PART - A (10 x 2 = 20)

Answer ALL the Questions

1.What is the structure of fiber?

2.Define the term attenuation in optical fiber.

3.State Weber-Fechner law.

4.What is the relation between loudness and intensity of sound?

5.Add the following binary numbers 01012 and 11112.6.What is Excess 3 code and gray code?

7.What are Nano phase materials?

8.What are the applications of nanodevices?

9.Give the difference types of scan.

10.Write a note on units of X radiation.

PART B

(5 x 12 = 60)

Answer All the Questions

11.Explain the principle of propagation of light through optical fiber.

(or)

12.(a) Explain the principle and working of optical fiber communication system with a neat block diagram.

(b) What are differences between single mode fiber and multimode fiber?

13.Describe the rate of growth and rate of decay of sound in an auditorium and derive the Sabines formula for reverberation time.(or)

14.Define absorption coefficient. Discuss the various factors affecting acoustics of buildings and how these can be rectified.

15.(a) Convert 328710 into octal equivalent

(b) Convert 1001102 to its octal number

(c) obtain decimal equivalent of hexadecimal number 9B

(d) convert 7368 into an equivalent binary number.(or)

16.(a) Perform the following binary subtraction using Is complement.

(i) 1010112 - 100102

(ii) 10002 - 112

(b) Perform the following binary subtraction using 2s complement.

(i) 11012 - 10112

(ii) 10002 - 11217.Explain how the nanomaterals are fabricated using bottom up approach.

(or)

18.Describe the construction and working of Injection Laser.

19.Describe the principle, construction and working of a Piezo electric generator to produce ultrasonic waves.(or)

20.With neat figure explain how the gamma camera is acting as a medical imaging device.