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PHYSICS
Test # 9

Q1.    To rotate a polarized light we use:
    (a)    Polaried    (b)    Certain organic substances like sugar
    (c)    Slits    (d)    None of these
Q2.    The scientist who study atomic structure by using x-rays diffrection is:
    (a)    Young    (b)    Huygen
    (c)    Bragg brothers    (d)    None of these
Q3.     is equation given by:
    (a)    Young    (b)    Huygen
    (c)    Bragg brothers    (d)    Newton
Q4.    The distance between two adjacent bright fringes in Young’s experiment as compared with the distance between dark fringes is:
    (a)    Large    (b)    Small
    (c)    Equal    (d)    None of these
Q5.    Gratings are used  for the most precise measurement of:
    (a)    Wavelength    (b)    Atomic size
    (c)    Interference    (d)    None of these
Q6.    For small value of 
    (a)         (b)     
    (c)         (d)    None of these
Q7.    For distractive interference, the path difference will be:
    (a)         (b)     
    (c)         (d)    None of these
Q8.    A surface passing through all points undergoing a similar disturbance (i.e. having same phase) at a given instant is called:
    (a)    Wavelets    (b)    Wave front
    (c)    Resultant wave    (d)    None of these
Q9.    In case of point source, the wave fronts are:
    (a)    Circular    (b)    Plans
    (c)    Spherical    (d)    Cylindrical
Q10.    Electromagnetic waves transport:
    (a)    Energy    (b)    Momentum
    (c)    Both energy and momentum    (d)    None of these
Q11.    In Young’s double slit experiment, path difference for two bright fringes is given by:
    (a)         (b)     
    (c)         (d)    None of these
Q12.    In Michelson interferometer, the displacement covered by mirror is given a:
    (a)         (b)     
    (c)         (d)     
Q13.     is condition obtained in:
    (a)    X-rays diffrection    (b)    Young double slit experiment
    (c)    Diffrection grating    (d)    Newton’s rings
Q14.    The wave nature of light was proposed by:
    (a)    Young    (b)    Fresnel
    (c)    Maxwell    (d)    Huygen

   
     

Q15.    The speed of light in vacuum depends upon:
    (a)    Time period    (b)    Frequency
    (c)    Wavelength    (d)    None of all
Q16.    Huygen’s principle is used to find:
    (a)    Explain polarization    (b)    Locate wave front
    (c)    Speed of light    (d)    Index of refraction
Q17.    The velocity of light was determined accurately by:
    (a)    Newton    (b)    Michelson
    (c)    Huygen    (d)    Young
Q18.    A white light beam when passed through a prism is:
    (a)    Emerge    (b)    Diffracted
    (c)    Dispersed    (d)    Polarized
Q19.    The fringe spacing in a double slit experiment can be increased by decreasing:
    (a)    Wavelength of light    (b)    Width of slits
    (c)    Slit separation    (d)    None of these
Q20.    Resolving power has unit:
    (a)    Meter    (b)    Radian
    (c)    No unit    (d)    Degree
Q21.    Bending of light around the edges of an obstacle is called:
    (a)    Refraction    (b)    Polarization
    (c)    Interference    (d)    Diffraction
Q22.    Which one of the following cannot be polarized:
    (a)    Radio wave    (b)    Ultraviolet rays
    (b)    X-rays    (d)    Sound waves
   
     
Q23.    The index of refraction of a medium depends on:
    (a)    Nature of medium    (b)    Wavelength of light
    (c)    Frequency of light    (d)    Velocity of light
Q24.    Optics is the branch of physics in which we study the properties of light as its:
    (a)    Wave nature    (b)    Particle nature
    (c)    Dual nature    (d)    None of these
Q25.    Two ore more than two sources having a constant phase difference of emitted monochromatic waves are called:
    (a)    Similar sources    (b)    Coherent sources
    (c)    Individual sources    (d)    None of these
Q26.    In Young’s fringes result, dark fringes called:
    (a)    Maxima    (b)    Minima
    (c)    Coherent    (d)    Monochromatic
Q27.    The first dark fringe in Young’s experiment having:
    (a)    m=0    (b)    m=1
    (c)    m=     (d)     
Q28.    The center of Newton’s rings for reflected light is always:
    (a)    Bright    (b)    Dark
    (c)    Either dark or bright    (d)    None of these
Q29.    The phenomenon shows the transverse behaviour of light is:
    (a)    Interference    (b)    Differection
    (c)    Refraction    (d)    Polarization
Q30.    Laser beam propagate:
    (a)    Spherically    (b)    Cylindrically
    (c)    Conically    (d)    None of these

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PHYSICS
Test # 10
   
     


Q1.    The diameter of a lens is called:
    (a)    Focal length    (b)    Principal axis
    (c)    Optical center    (d)    Aperture
Q2.    In going from a denser to rarer medium, a ray of light is:
    (a)    Undeviated    (b)    Bent away from normal
    (c)    Bent towards the normal    (d)    Diffracted
Q3.    Least distance of distinct vision for normal human eye is:
    (a)    15cm    (b)    25cm
    (c)    30cm    (d)    40cm
Q4.    The magnifying power of a simple microscope is M=
    (a)         (b)     
    (c)         (d)     
Q5.    For glass-air boundary, the value of critical angle 
    (a)    37°    (b)    50°
    (c)    41.8°    d)    48°
Q6.    The diameter of single mode step fibre core is:
    (a)         (b)     
    (c)         (d)     
Q7.    The magnifying power of a convex lens of focal length 5cm is:
    (a)    3    (b)    5
    (c)    6    (d)    20
Q8.    The focal length ‘f’ and radius of currature are related by:
    (a)         (b)     
    (c)    R=f    (d)    None of these
Q9.    The resolving power is expressed by a formula:
    (a)         (b)     
    (c)         (d)     
Q10.    The minimum distance between an object and its real image in a convex lens is:
    (a)    2f    (b)    2.5f
    (c)    3f    (d)    4f
Q11.    The magnifying power of a convex lens of focal length 5cm is:
    (a)    3    (b)    5
    (c)    6    (d)    20
Q12.    The real image formed by a convex lens of focal length 10cm is twice the size of object. The position of the object from lens is:
    (a)    15cm    (b)    20cm
    (c)    50cm    (d)    30cm
Q13.    If an object is placed away from 2f of a converging (convex) lens, then the image will be:
    (a)    Virtual    (b)    Real and erect
    (c)    Real and inverted    (d)    Virtual and erect
Q14.    The unit of power of lens is:
    (a)    Meter    (b)    Watt
    (c)    Newton    (d)    Dioptre
Q15.    The distance between principal focus and the optical center of the les is called:
    (a)    Radius of curvature    (b)    Focal length
    (c)    Aperture    (d)    Principal axis
Q16.    In human eye, the natural lens is:
    (a)    Concave    (b)    Convex
    (c)    Plano convex    (d)    None of these
Q17.    Magnifying power of astronomical telescope is:
    (a)         (b)     
    (c)         (d)    None of these
Q18.    f=5cm of simple microscope gives magnification:
    (a)    5    (b)    6
    (c)         (d)    None of these
Q19.    Resolving power has unit:
    (a)    m    (b)    Radian
    (c)    No unit    (d)    None of these
Q20.    Refrective index of core as compare with cladding in optical fibre is:
    (a)    Large    (b)    Small
    (c)    Equal    (d)    None of these
Q21.    Least distance of distinct vision is:
    (a)    0.25m    (b)    25cm
    (c)    250mm    (d)    All are correct
Q22.    According to Rayleigh, the resolving power of lens is of diameter ‘D’ is:
    (a)         (b)     
    (c)         (d)     
Q23.    In telescope final image is:
    (a)    Virtual    (b)    Real
    (c)    Small    (d)    All of these
Q24.    Spectrometer consists of how many main parts?
    (a)    1    (b)    2
    (c)    3    (d)    4
Q25.    The phenomenon used in optical fibre is:
    (a)    Reflection    (b)    refraction
    (c)    Diffrection    (d)    Totally internal reflection
Q26.    What type of device is used in transmitter for optical fibre?
    (a)    LED    (b)    Diode
    (c)    Photodiode    (d)    None of these
Q27.    Infrared light has the wavelength:
    (a)         (b)     
    (c)         (d)     
Q28.    Alexender Graham Bell invented:
    (a)    Wireless    (b)    Radio
    (c)    Transmitter    (d)    Photo phone
Q29.    Speed of light is:
    (a)         (b)     
    (c)         (d)    332m/sec2
Q30.    Angle of incident for which angle of refraction is 90° is called:
    (a)    Diffraction angle    (b)    Minimum deviation
    (c)    Critical angle    (d)    None of these
Q31.    According to Snell’s law:
    (a)         (b)     
    (c)         (d)    None of these
Q32.    Large aperture of eye piece as compared with objective is in:
    (a)    Simple microscope    (b)    Compound microscope
    (b)    Astronomical microscope    (d)    All of these
Q33.    Virtual image is formed always by:
    (a)    Convex lens    (b)    Concave lens
    (c)    Plane lens    (d)    None of these
Q34.    In optical fibre refretive index of core as compared with cladding is:
    (a)    Large    (b)    Small
    (c)    Equal    (d)    None of these
Q35.    Converging lens in the name of:
    (a)    Convex lens    (b)    Concave lens
    (c)    Plane lens    (d)    None of these

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PHYSICS
Test # 11


Q1.    Fahrenheit and centigrade thermometers have the same reading at:
    (a)    100°    (b)    60°
   
     
    (c)    40°    (d)    -40°
Q2.    Temperature of human body on Kelvin scale is:
    (a)    273K    (b)    373K
    (c)    310K    (d)    236K
Q3.    The value of universal gas constant “R” in SI units is in (J/mole-K)
    (a)    83.10    (b)    8314
    (c)    831.4    (d)    8.314
Q4.    The unit of pressure of gas is
    (a)         (b)    One pascal
    (c)    One atmosphere    (d)    All of the above
Q5.    The temperature of a system remains constant in:
    (a)    Adiabatic process    (b)    Isobaric process
    (c)    Isothermal process    (d)    Adiabatic process
Q6.    For a mono atomic gas  , therefore gamma ‘ ’ for this gas is:
    (a)         (b)     
    (c)         (d)     
Q7.    Food is cooked quicker in pressure cooker because it is:
    (a)    Made of metal    (b)    Conductor of heat
    (c)    No heat is lost    (d)    Raise the boiling point
Q8.    General gas law or general gas equation is derived from:
    (a)    Boyle’s law    (b)    Charle’s law
    (c)    Arogadro’s law    (d)    All of the above
Q9.    The concept of entropy was introduced by R. Clausius in the year:
    (a)    1840    (b)    1856
    (c)    1850    (d)    1860
Q10.    The highest efficiency of a heat engine whose lower temperature is 17°C and the high temperature of 200°C is:
    (a)    70%    (b)    100%
    (c)    35%    (d)    38%
Q11.    The sum of all forms of molecular energies of substance is called:
    (a)    Temperature    (b)    Heat
    (c)    Pressure    (d)    Internal energy
Q12.    One mole of any substance contains:   
    (a)    Some number of molecules    (b)    Different number of molecules
Number of molecules depend upon nature of the gas        (d)     None of these
Q13.    Efficiency of diesel engine is:
    (a)    5%-10%    (b)    10%-20%
    (c)    35%-40%    (d)    20%-25%
Q14.    Pressure of gas is:
    (a)         (b)     
    (c)         (d)    None of these
Q15.    Carnot engine gives efficiency as compared with other engines:
    (a)    Maximum    (b)    Equal
    (c)    Sometime maximum    (d)    None of these

   
     

Q16.    In adiabatic process:
    (a)    Q=0    (b)     
    (c)    W=0    (d)    None of these
Q17.    Unit of Entrapy is:
    (a)    No unit    (b)     
    (c)    Pascal    (d)    Calorie
Q18.    Unit of  is:
    (a)    J/K    (b)     
    (c)         (d)    None of these
Q19.    In isothermal process:
    (a)    Temperature is not constant    (b)     
    (c)    Q=0    (d)    W=0
Q20.    Unit of “ ” is:
    (a)    Pascal    (b)     
    (c)    Joule    (d)    None of these
Q21.    Value of Boltzman constant is:
   
     
    (a)         (b)     
    (c)    273k    (d)    None of these
Q22.    In case of adiabatic process:
    (a)    PV=Constant    (b)     
 
 = Constnat
    (c)    V/T=Constant    (d)    None of these
Q23.     as compared with  is:
    (a)    Small    (b)    Large
    (c)    Equal    (d)    None of these
Q24.    The area of P-V graph for Carnot engine represents:
    (a)    Efficiency    (b)    Work
    (c)    Power    (d)    None of these
Q25.    If system goes to disorder we say its Entropy:
    (a)    Decreases    (b)    Increases
   
     
    (c)    Remain same    (d)    None of these
Q26.    For ideal heat engine:
    (a)         (b)     
    (c)         (d)    None of these
Q27.    Triple point of  is:
    (a)    0°C    (b)    273.16k
    (c)    Both ‘a’ and ‘b’    (d)    373.16k
Q28.    In the given plot of P-V
                Curve 1 is:
    (a)    Isotherm    (b)    Adiabat
    (c)    Isobaric    (d)    None of these
Q29.    In above plot of P-V, curve 2 is:
    (a)    Isotherm    (b)    Adiabat
    (c)    Isobaric    (d)    None of these
Q30.    PV=NkT where N is:
    (a)    Number of moles    (b)    Number of molecules
    (c)    Number of molecules per unit volume    (d)    None of these
Q31.    In refrigerator by using energy we can make it possible for heat to flow from:
    (a)    Hot to cold body    (b)    Cold to hot body
    (c)    Both ‘a’ and ‘b’    (d)    None of these
Q32.    When water freezes to convert in ice, Entropy of system:
    (a)    Remains constant    (b)    Increases
    (c)    Decreases    (d)    None of these