Engineering FE Engineering Common Sem 1 2019 December 2019 Engineering Physics I Question Paper - Mumbai University | munotes
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Questions asked in this paper
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Q2 Attempt any three questions from Q.2 to Q.6
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Q4 Figures on the Right indicates marks
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Q1 Attempt any five questions from the following 15 marks
- (a) Draw (0 0 2), (100), (0 1 1)
- (b) Explain any three properties of matter waves
- (c) Differentiate between Direct and Indirect band gap semiconductor
- (d) Explain any three conditions for Sustained Interference
- (e) A source is emitting 150W of red light of wavelength of 600nm. How many photons per second are emerging from the source?
- (f) Explain the Meissner effect with application
- (g) Explain Magneto Resistance with application
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Q2 Show that Non- Existence of electron in the Nucleus, Find the uncertainty in the position of electron . The speed of an electron is measured to be 4.0 x m/s to an accuracy of 0.002% . [8]
- (b) Define the Fermi energy level , Show that in intrinsic semiconductor Fermi level is at the centre of Forbidden energy gap. Draw the position of Fermi level in intrinsic, P-type and N-type semiconductor. [7]
- (a) Explain with diagram X Ray Spectrometer . Calculate the interplaner spacing between the family of planes (1 1 1) in crystal of lattice constant [8]
- (b) Prove that the Diameter of the dark ring in Newton’s ring setup is directly proportional to the square root of the ring number . In Newton’s Rings reflected light of wavelength 5 x cm. The diameter of the 10" dark ring is 0.5 cm Calculate radius of curvature R. [7]
- (b) Differentiate between Type I superconductor and Type II superconductor. 5
- (c) Find Resistance of an intrinsic Ge rod of dimensions ( lcm long , Imm wide and Imm thick) at 300K . For Ge x , = 0.39m7/v-s ,
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Q5 Derive the condition for maxima and minima due to interference of light reflected from thin film of uniform thickness. [5]
- (b) Explain Hall Effect . Derive the equation for Hall Voltage. 5
- (c) Calculate the lowest three energy states of an electron confined in potential well of width [5]
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Q6 Explain multiferroics and its different types. 5 marks
- (b) A soap film cm thick is viewed at angle of to normal. Calculate Wavelength of light in the visible spectrum which will be absent from the
- (c) The Coefficient (Rh) of semiconductor is 3.22 x 10 Its resistivity 10 Calculate the mobility and concentration of carriers. [5]
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