Andhra University 2009 B.Com B.A./B.Sc./Core Subjects -I Physics- MECHANICS WAVES AND OSCILLATIONS - Question Paper

PART—II PHYSICS
(Common Core Scheme)
PAPER-I – MECHANICS WAVES AND OSCILLATIONS
(with mathematics combination)

Time:3 Hours Max.Marks:100

SECTION-A (4x15 = 60)

ans all the ques.

1. (a) describe gradient of a scalar field and curl of a vector. State and prove Gauss
Divergence theorem.

Or

(b) discuss impact parameter and scattering cross part find the expression for
Rutherford scattering cross part.

2. (a) State and prove Kepler's laws of planetary motion.

Or

(b) define the Michelson-Morley experiment and discuss the physical significance of
The negative outcome.

3. (a) discuss the characteristics of Simple Harmonic motion. explain analytically the
Linear combination of simple harmonic motions of the identical frequency acting at right angles with different phase differences.

Or
(b) Distinguish ranging from damped and undamped vibrations of a simple oscillator.
Derive an formula of motion of a damped oscillator and find its solution.

4. (a) find the wave velocity from the theory of transverse vibrations of strings. What
Are overtones and harmonics?

Or

(b) Write an essay on the production, detection and applications of ultra sonic waves.

part – B (5x4 = 20)
ans any 5 ques. at lowest 2 ques. from every Part
PART – A

5. find the formula of motion for a rotating body.

6. discuss the Principle of multistage rocket.

7. discuss the Principle and working of a gyroscope.

8. Derive an expression for Mass-Energy equivalence.

PART—B

9. Write the expression for the frequency of vibration a spring taking its mass into
Consideration.

10. discuss Fourier theorem and the method to evaluate the Fourier Coefficients.

11. What is logarithmic decrement and how to accurate it?

12. explain briefly the longitudinal modes of vibration of a bar clamped at the centre.

SECTION—C (5x4 = 20)
ans any 5 ques. at lowest 2 ques. from every Part

PART—A

13. obtain the constants a,b,c, so that the vector A=i(x+2y+az) + j (bx-3y-z) + k(4x+cy+2z)
Is orrotational

14. A rocket of mass 200 kg has 1800kg of fuel. The exhaust velocity of the fuel is
2.45km/sec compute the minimum rate of consumption of fuel so that the rocket
May raise from the ground. Also compute the ultimate vertical velocity gained by
The rocket, when the rate of consumption of the fuel is 20kg/sec.

15. A body of mass M1 collides elastically with a different body of mass M2 at rest.
After collision the velocity of M1 becames ¾ times of the initial velocity. obtain
The ratio of their masses.

16. The Young'

Earning:   Approval pending.