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25. `
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30.

31.

5110185.
five qe
rite any grapb-
wrt in one para

4 marks each.

ts.
3 tic constan
Obtain a relation connecting three elas
What is quality factor ?

Briefly describe a forced harmonic oscillator.
Write a short note on anharmonic oscillator.
Discuss about plane progressive harmonic wave.
Explain Fourier’s theorem.

Briefly describe the production of ultrasonic waves. (5 x 4=20 sind

Section D

Solve any four problems.
4 marks each.

, 11 N/m? and rigidit
Calculate the Poisson’s ratio for steel. Given that Young’s modulus is 2 x 10 8701

3

modulus is 8 x 1010 N/n2.

A particle having mass 4 g executes SHM. When its displacement is 8 cm, the force acting on th,

body is 24 gwt. Find its period. ١
The total energy of a harmonic oscillator is E. For what value of the displacement the kinetic anc
potential energies are equal.

with an initial velocity 1 m/s is acted upon by a damping force

which brings it to rest in a distance of 10 cm. Calculate relaxation time.

Calculate the speed of transverse waves in a wire of 1 mm? cross-section under the tension produced
by 0.1 kg weight. Density of the material = 9.8 x 10° kg/m3, & = 9.8 77/92,

Find the frequency and period for light of wavelength 600 nm. Given ¢ = 3x 108 m/s

Calculate the bulk modulus of water under a pressure of 100 atm. Initial and final volume are
100 litres and 100.5 litres respectively.

(4 x 4 - 16 marks)