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‎sECOND SEMESTER (CUCBCSS—UG) DEGREE EXAMINATION, MAY 2019

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‎: Three Hours

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‎B.Sc.—Physics/Applied Physics

‎PHY 2B 02/APY 2B 02—PROPERTIES OF MATTER, WAVES AND ACOUSTICS

‎Section A

‎Answer all questions.
1 mark each.
S.I. unit of Young’s modulus Y is

‎Write an expression for Poisson’s ratio.

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‎The equation for time period of a torsion pendulum is
Write the differential equation of SHM.
The relation connecting time period and frequency is

‎Give an example of a harmonic oscillator.

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‎The total kinetic energy of a harmonic oscillator is proportional to
Define Wave front.
What is pressure amplitude ?

‎Mention the unit of sound.
(10x 1

‎Section B

‎Answer all questions.
Write in two or three sentences.
2 marks each.

‎Write a note on bending moment.

‎What is bulk modulus ?

‎Write an expression for potential energy of a harmonic oscillator.
What is the condition for critical damping ?

‎Give two examples of damped harmonic oscillator.

‎Obtain an expression for intensity of waves.

‎Discuss about the loudness of sound.

‎Maximum : 80 Marks

‎(7 x 2 = 14 marks)

‎۳ ‏سی‎ over