BSc Physics SEM II 2015 16 2015-16 ATKT PHYSICS II Question Paper - Mumbai University | munotes

Questions asked in this paper

• 2) Figures to the right indicates full marks

1. Q4 Use of log - table or Non - programmable calculator is allowed
2. Q1 Answer the following : (any one) 8 marks
   • (i) Use Thevenin theorem and determine the load current for the circuit shown in following
   • (ii) Describe the ballistic galvanometer of a suspended type and give theory of its working
   • B) Answer the following : (any one) 4
   • (i) Can you determine the power factor and the Q, factor of a coil using a suitable ac bridge? fii) State and explain maximum power transfer theorem ‘Answer the following : (any one) : 5
   • (i) De Sauty’s capacitance bridge has R, = 8009, R, = 1000Q and C, = 0.22uF. Find the value of the other capacitor when the bridge is balanced
   • (ii) A B.G. has a steady deflection of 150mm for a current of at a distance of 1 meter it completes 10 oscillations in 62.8 sec. Find its current and charge sensitivities. What ) should be the undamped throw. When a charge of 0.15 m circulates through the B.G. 2 A) Answer the following : (any one)
   • (i) What do you understand by Nuclear magnetic resonance? Mention its applications
   • (ii) What is ‘radioactivity? Explain the five kinds of radioactivity with suitable examples
   • B) Answer the following : (any one) q
   • (i) Justify the statement that, “Carbon dating an archaeological time scale”. Define half life of a radio active
   • (ii) Write a note on nuclear size and nuclear spin. Hence show that the radius of an atomic
   • Q.P. Code:- SC2P020316X (2) q
   • C) Answer the following : (any one)
   • (i) Using the given data find the of neutron in the 7Li nucleus. Express it in MeVand joules Given - 7Li = 7.016004, SLi = 6.015125 and gn’ = 1.008665
   • (ii) In a store 10mg of a radioadctive sample is kept for 4 years. A radioactive has half life time of two years. Find how much of the material unchanged?
3. Q3 A) Answer the following : (any one)
   • (i) Explain the experimental demonstration of the compton effect and show that its energy is, where symbols have their usual meaning
   • (ii) With the help of a neat labelled diagram explain the formation of a wave group formed by the super position of two waves defined by two wave function and having same amplitude, different propagation number and different angular velocity
   • B) Answer the following : (any one)
   • (i) What is dual - nature of a matter? Explain it on the basis of Davisson - Germer experiment. Derive the necessary relation to show that the de-Broglie wave associated with an electron is of the order
   • (ii) Write a note on:
   • (a) Pair production (b) Photons and
   • C) Answer the following : (any one)
   • (i) Ifa Photon has an energy 1KeV, what will be its wavelength and
   • (ii) Calculate the certainty with which one can locate the position of an electron, moving with a speed of 500 m/s with an accuracy 0.005%. Given = 6.6 x J -S,
   • A) Obtain the condition of balance for maxwell’s L/C
   • B) State Thevenin’s and Norton’s theorem illustrate them with suitable example
   • C) of radium has half - life time of the order 22 years. Find the time taken by a sample to decrease to 10%
   • D) Define: Mass defect and Binding energy and Binding energy per nucleon
   • E) Calculate the wavelength that is scattered through an angle when a monochromatic X - radiation of wavelength suffers compton shift, carbon block
   • F) State Heisenberg uncertainty principle relating conjugate variables:
   • (i) Position and Momentum
   • (ii) Energy and time

Read from the scan above, so a character or two may differ. The scan is the original.