BSc Sem II 2014 2015 2015 Phy I Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 Answer the following: 20 marks
   • A) Derive the equation of composition of two perpendicular SHMs of the same period. Obtain Lissajous figures for 8=0, (8M)
   • B) Write down the equation of motion of Simple Harmonic Motion. Obtain its solution and expression for angular frequency. Why is SHM called sinusoidal motion? (8M)
   • C) Three particles of masses 2kg, 3kg and 4kg are moving such that their position vectors are given by . (0,6t,0) and Find the angular momentum of the system and the external torque acting on the system. (7M)
   • D) Derive an expression for angular momentum ofa System of particle about a fixed point O in centre of mass co-ordinate system. (7M)
   • E) Four masses Ikg, 2kg, 3kg and 4kg are located at and respectively. Find the center of mass of this system. (SM)
   • F) What are Lissajous figures? What factor do their shapes depend upon? (SM)
2. Q2 Answer the following: 20 marks
   • A) Show that the spherical aberration is minimum if in a lens System, two thin lenses L, and of focal lengths f, and are at a distance d apart which is equal to the difference in their
   • B) Describe how will you determine angle of prism using a spectrometer and derive expression
   • C) Describe ring experiment to find wavelength of incident light used in an
   • D) A lens has one radius of curvature 30cm and other half of it. Find the refractive index if the focal length of a system. (SM) BE) Assuming an expression for radius of a dark ring, show that the rings are more and more crowed as one move away from the center. (5M)

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