Online Preliminary Examination-may,2020 For B.Sc.-IV Semester,Organized By Department Of Physics,Sgmm Hingna,Dist-nagpur

25 Questions | Total Attempts: 42

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Online Preliminary Examination-may,2020 For B.Sc.-IV Semester,Organized By Department Of Physics,Sgmm Hingna,Dist-nagpur

B. Sc. Sem-IV Instructions for examination: The Quiz is based on the R. T. M. Nagpur University Syllabus of B. Sc. (Physics). B. Sc. Second Year (Semester IV) Course-PHYSICS - Paper-I (401) (Solid state physics, X-ray and Laser) The Quiz consist of total 25 multiple choice questions. Each question carry TWO marks All Questions are Compulsory. No negative marking Has a time limit of 120 minutes Has a pass mark of 50% You can download certificate after finishing the quiz.


Questions and Answers
  • 1. 
    Miller indices for plane having intercept 3a, 3b, 2c with respective X, Y, Z axes are
    • A. 

      (323)

    • B. 

      (332)

    • C. 

      (223)

    • D. 

      (333)

  • 2. 
    Number of atoms per unit cell for FCC structure is
    • A. 

      0

    • B. 

      1

    • C. 

      2

    • D. 

      4

  • 3. 
    Coordination number for an ideal BCC metallic crystal is:
    • A. 

      4

    • B. 

      6

    • C. 

      8

    • D. 

      12

  • 4. 
    The smallest portion of the lattice is known as __________
    • A. 

      Bravais crystal

    • B. 

      Unit cell

    • C. 

      Lattice point

    • D. 

      Lattice structure

  • 5. 
    Which of the following axis system is being satisfied by cubic crystal system?
    • A. 

      A = b = c, α = β = γ = 900

    • B. 

      A = b ≠ c, α = β = γ = 900

    • C. 

      A = b = c, α ≠ β = ϒ = 900

    • D. 

      A ≠ b = c, α = β = γ = 900

  • 6. 
    With respect to rotational symmetry operation which of the following symmetry is not possible
    • A. 

      5-fold symmetry

    • B. 

      6-fold symmetry

    • C. 

      4-fold symmetry

    • D. 

      3-fold symmetry

  • 7. 
    X-ray lies in which region of the electromagnetic spectrum?
    • A. 

      10 Å to 7000 Å

    • B. 

      4000 Å to 10 Å

    • C. 

      10 Å to 0.01 Å

    • D. 

      1 Å to 10 Å

  • 8. 
    In free space, X-ray travels in ______________
    • A. 

      Zig-zag path

    • B. 

      Non-Periodic oscillations

    • C. 

      Periodic oscillations

    • D. 

      Straight line

  • 9. 
    The cathode in the Coolidge tube is made of which of the following elements?
    • A. 

      Quartz

    • B. 

      Iron

    • C. 

      Tungsten

    • D. 

      Barium

  • 10. 
    X-rays were invented b
    • A. 

      Albert Einstein

    • B. 

      Isaac Newton

    • C. 

      Wilhelm Rontgen

    • D. 

      None of the above

  • 11. 
    Mathematically Bragg's law is stated as-
    • A. 
    • B. 
    • C. 
    • D. 
  • 12. 
    X-ray crystallography uses which law for its implementation?
    • A. 

      Einstein’s law

    • B. 

      Planck’s law

    • C. 

      Bragg’s law

    • D. 

      Compton law

  • 13. 
    X-ray crystallography uses which characteristic of light?
    • A. 

      Polarization

    • B. 

      Diffraction

    • C. 

      Interference

    • D. 

      Coherency

  • 14. 
    According to Moseley's Law "The frequency of a given characteristic X-ray line ____________regularly with the increase in atomic number of the element."
    • A. 

      Decreases

    • B. 

      Remains constant

    • C. 

      Increases

    • D. 

      None of the above

  • 15. 
    The Duane-Hunt rule is analytically expressed as---- (Where e-charge on electron, V-voltage applied, n is the frequency of light radiation and h is Plank's constant)
    • A. 

      EV = hnmax

    • B. 

      EV = 2 hnmax

    • C. 

      E / V = h / nmax

    • D. 

      Enmax = hV

  • 16. 
    A unique property of LASER is-
    • A. 

      Directional

    • B. 

      Speed

    • C. 

      Coherence

    • D. 

      Wavelength

  • 17. 
    LASER is acronym for
    • A. 

      Light Accreditation by Stimulated Emission of Radiation

    • B. 

      Light Amplification by Spontaneous Emission of Radiation

    • C. 

      Light Acceleration by Stimulated Emission of Radiation

    • D. 

      Light Amplification by Stimulated Emission of Radiation

  • 18. 
    Each point in a reciprocal lattice corresponds to----
    • A. 

      A particular set of perpendicular planes of the direct lattice

    • B. 

      A particular set of parallel planes of the direct lattice

    • C. 

      A particular set of similar planes of the direct lattice

    • D. 

      None of the above

  • 19. 
    In which of the following method of diffraction the X-ray of continuous type are used?
    • A. 

      Rotating crystal

    • B. 

      Powder

    • C. 

      Laue

    • D. 

      None of the above

  • 20. 
    Bragg's X-ray spectrometer are not used to identify the physical properties of which of the following?
    • A. 

      Metals

    • B. 

      Liquids

    • C. 

      Polymeric materials

    • D. 

      Solids

  • 21. 
    In computer printers _________ laser is used
    • A. 

      He–Ne gas

    • B. 

      Ruby

    • C. 

      Semiconductor

    • D. 

      CO2

  • 22. 
    Which of the following statement is true
    • A. 

      He-Ne laser is two level laser system

    • B. 

      He-Ne laser is semiconductor laser

    • C. 

      He-Ne laser is a Gas laser

    • D. 

      He-Ne laser emits polychromatic light

  • 23. 
    The process by which atoms are raised from the lower energy level to the upper energy level is called—
    • A. 

      Pumping

    • B. 

      Assembling

    • C. 

      Gathering

    • D. 

      Gearing

  • 24. 
    A longer-lived upper energy level in an atom where atom remain excited for appreciable time is known as--
    • A. 

      Mega-stable state

    • B. 

      Mini-stable state

    • C. 

      Multistable state

    • D. 

      Metastable state

  • 25. 
    Electromagnetic light consists of photon each of energy E=hn. Where n is the frequency associatd with each photon then, what 'h' stands for in the given equation?
    • A. 

      Gravitation constant

    • B. 

      Planck’s constant

    • C. 

      Permittivity

    • D. 

      Attenuation constant

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