# 2005 Andhra University B Sc Physics B sc physics degree examination april 2005 Question paper

** University Question Papers **

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**2005 Andhra University B Sc Physics B sc physics degree examination april 2005 Question paper

ANDHRA UNIVERSITY

B.Sc., DEGREE EXAMINATION

(Examination at the end of First Year)

APRIL 2005

PART II : Physics

Paper I : Mechanics, Waves & Oscillations Time:3hrs [Max: 100 Marks

SECTION - A (4 X 15 = 60 Marks)

Answer all questions

1. (a) Define curl and div of a vector. State and prove Gauss theorem of divergence.

(OR)

(b) What do you understand by collision ? Distinguish between elastic and inelastic collisions. Derive expressions for final velocities of two bodies after a one dimensional elastic collision between them.

2. (a) What is a central force? Show that central force is conservative force. State Kepler’s laws of planetary motion

(OR)

(b) Describe the Michelson – Morley experiment and explain the physical significance of the negative result.

3. (a) Distinguish between damped and undamped vibrations of a harmonic oscillator. Form the equation for damped harmonic motion and obtain its solution.

(OR)

(b) State and explain Fourier theorem. Explain how you analyse periodic functions using Fourier theorem.

4. (a) What is a coupled pendulum ? Discuss the different modes and amplitudes of single oscillator and double oscillator

(OR)

(b) Obtain the wave velocity from the theory of transverse vibrations of strings. What are overtones?

section - B (5 X 4 = 20 Marks)

Answer any five questions

5. Obtain the equation of motion for a rotating body.

6. Explain the working of a gyroscope.

7. Give a brief account of the classification of beams.

8. What is meant by Lorentz contraction? Obtain an expression for it.

9. Derive an expression for the frequency of vibration of a spring taking its mass into consideration.

10. Write short notes on Lissajou’s figures.

11. Explain energy transport in vibrating strings.

12. How do you produce ultrasonic waves by piezoelectric effect

section - c (10 X 2 = 20 Marks)

Answer all questions.

13. State Stoke’s theorem.

14. Explain principle of Rutherford scattering.

15. Explain sign conventions in bending beams.

16. Give two examples of central forces.

17. Explain time dilation.

18. Explain the principle of beats.

19. What is amplitude resonance ?

20. What is N-coupled oscillator ?

21. Explain transverse impedance.

22. Give two properties of ultrasonic waves