AFMC–Past papersPHYSICS- UNSOLVED PAPER - 2005
SECTION – ASingle Correct Answer TypeThere are five parts in this question. Four choices are given for each part and one of them is correct.  Indicate  you choice of  the correct  answer for  each part in  your answer-book by  writing  the letter (a), (b), (c) or (d)  whichever  is appropriate
Problem01Which of the following pair can produce erect, diminished and virtual image?convex mirror and concave lensconvex lens and convex mirrorconvex lens and concave mirrorconcave lens and concave mirror
Problem02For photoelectric emission, tungsten requires light of2300 A. If light of 1800 A wavelength is incident then emissiontakes place don't take placemay or may not take placedepends on frequency
Problem03A tyre kept outside in sunlight bursts off after sometime because ofincrease in pressureincrease in volume both (a) and (b)none of these
Problem04For a wire of length /, maximum change in length under stress condition is 2 mm. What is the change in length under same conditions when length of wire is halved?1 mm 2 mm4 mm 8 mm
Problem05Air is blown through a hole on a closed pipe containing liquid. Then the pressure willincrease on sides increase downwardsincrease in all directionsnever increases
Problem06Light year is a unit oftime speeddistance none of these
Problem07A semiconductor dopped with a donor impurity isp-typew-typen-p-n type p-n-p type
Problem08A wire carrying current I and other carrying 2Iin the same direction produces a magnetic B at the mid point. What will be the field when 2I wire is switched off?5/2 2BB 45
Problem09What will be energy stored in a strained wire?  ½ x Load x extension½ x  stress x strain ½ x load x strain½ x load x stress
Problem10If error in measurement of radius of sphere 1%, what will be the error in measurement. volume?1% 1/3%3% 10%
Problem11Minimum number of unequal vectors which can give zero resultant aretwo threefour more than four
Problem12A coin is dropped in a lift. It takes time t1 to reach the floor when lift is stationary. It takes time when lift is moving up with constant acceleration ThenT1 > T2T2 > T1T1=T2T1>>T2
Problem13A large ship can float but a steel needle sink because ofviscosity surface tensiondensity None of these
Problem14In a solenoid, if number of turns is doubled, then self inductance will becomehalf doubled1/4 times quadruped
Problem15Core of transformer is made up ofsoft iron steeliron alnico
Problem16Transformer is based upon the principle ofself induction mutual inductioneddy current none of these
Problem17Refractive index of material is equal to tangent of polarising angle. It is calledBrewster's law Lambert's lawMalus's law Bragg's law
Problem18A car accelerates from rest at constant rate for 1st 10s. and covers a distance x. It covers a distance y in next 10 s at the same acceleration. Which of the following is true?x = 3y y = 3xx=y y = 2x
Problem19The horizontal range of a projectile is 400 m. The maximum height attained by it will be100 m 200 m400 m800 m
Problem20What determines the nature of the path followed by the particle?speed velocityacceleration none of these
Problem21Which of the following is not an example of perfectly inelastic collision?a bullet fired into a block if bullet gets embedded into blockcapture of electrons by an atoma man jumping on to a moving boata ball bearing striking another ball bearing
Problem22The length of seconds pendulum is 1 m on earth. If mass and diameter of the planet is doubled than that of earth, then length becomes1 m 2 m0.5 m  4 m
Problem23Why the dam of water reservoir is thick at the bottom?quantity of water increases with depthdensity of water increases with depthpressure of water increases with depthtemperature of water increases with depth
Problem24A hot and a cold body are kept in vacuum separated from each other. Which of the following cause decrease in temperature of the hot body?radiation convectionconductiontemperature remains unchanged.
Problem25When a tuning fork produces sound waves in air, which one of the following is same in the material of tuning fork as well as in air?wavelength frequencyvelocity amplitude
Problem26A bomb explodes on the moon. How long will it take for the sound to reach the earth?10 s 1000 s1 day none of these
Problem27What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line? 0° 90°180°none of these
Problem28Which of the following is not the property of equipotential surfaces?they do not cross each otherthey are concentric spheres for uniform electric fieldrate of change of potential with distance on them is zerothey can be imaginary spheres
Problem29The potentials of the two plates of capacities are +10 V and - 1 0 V. The charge on one of the plates is 40 C. The capacitance of the capacitor is2 F 4 F0.5 F 0.25 F
Problem30To draw maximum current from a combination of cells, how should the cells be grouped?series parallelmixeddepends upon the relative values of external and internal resistance.
Problem31A wire is cut into 4 pieces, which are put together by sides to obtain one conductor. If the original resistance of wire was R, the resistance of the bundle will beR/4 R/8R/16 R/32
Problem32Which of the following is not a property of light?it requires a material medium for propagationit can travel through vacuumit involves transportation of energyit has finite speed
Problem33What causes changes in the colors of the soap or oil films for the given beam of light?angle of incidenceangle of reflectionthickness of film none of these
Problem34What happens to the fringe pattern when the Young's double slit experiment is performed in water instead of air?shrinks disappearunchanged enlarged
Problem35Sir C. V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?scattering diffractioninterference polarisation.
Problem36An object is placed at a distance equal to focal length of convex mirror. If the focal length of the mirror be f, then the distance of the image from the pole of the mirror isless than fequal to fmore than finfinity
Problem37Ability of the eye to see objects at all distances is calledbinocular vision myopiahypermetropiaaccommodation
Problem38To increase magnifying power of telescope, we should increasethe focal length of the objectivethe focal length of the eyepieceaperture of the objectiveaperture of the eyepiece
Problem39The magnitude of saturation photoelectric current depends uponFrequencyintensitywork function stopping potential
Problem40Which of the following is most unstable?electrons protonsneutrons a-particle
Problem41After 2 hrs., 1/16th of initial amount of a certain radioactive isotope remains undecayed. The halflife of the isotope is15 min 30 min45 min 60 min
Problem4210 g of ice at 0°C is mixed with 100 g of water at 50°C. What is the resultant temperature of mixture?31.2°C 32.8°C36.7°C 38.2°C
Problem43An atomiser is based on the application ofTorricelli's theoremBernouilli's theoremArchimedes principleprinciple of continuity
Problem44"Pascal-second' has the dimensions offorce energypressurecoefficient of viscosity
Problem45Consider the following equation of Bernouilli's theorem. P+1/2 pV2+ pgh = K (constant). The dimensions of KIP are same as that of which of the following?thrust pressureangle viscosity
Problem46What effect occurs on the frequency of a pendulum if it is taken from the earth surface to deep into a mine?increases decreasesfirst increases then decreasesno effect
Problem47The crystal of diamond shines due tohigh densitytotal internal reflectioncrystal lattice none of these
Problem48The volume of a cube in m3 is equal to the surface area of the cube in m2. The volume of the cube is64 m3216 m3512 m3196 m3
Problem49An ice block contains a glass ball when the ice melts within the water containing vessel, the level of waterrises fallsunchangedfirst rises and then falls
Problem50A beaker is completely filled with water at 4°C. It will overflow ifheated above 4°Ccooled below 4°Cboth heated and cooled above and below 4°C respectivelynone of the above
For solution visit www.vasista.net

AFMC Physics 2005

  • 1.
  • 2.
    SECTION – ASingleCorrect Answer TypeThere are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate
  • 3.
    Problem01Which of thefollowing pair can produce erect, diminished and virtual image?convex mirror and concave lensconvex lens and convex mirrorconvex lens and concave mirrorconcave lens and concave mirror
  • 4.
    Problem02For photoelectric emission,tungsten requires light of2300 A. If light of 1800 A wavelength is incident then emissiontakes place don't take placemay or may not take placedepends on frequency
  • 5.
    Problem03A tyre keptoutside in sunlight bursts off after sometime because ofincrease in pressureincrease in volume both (a) and (b)none of these
  • 6.
    Problem04For a wireof length /, maximum change in length under stress condition is 2 mm. What is the change in length under same conditions when length of wire is halved?1 mm 2 mm4 mm 8 mm
  • 7.
    Problem05Air is blownthrough a hole on a closed pipe containing liquid. Then the pressure willincrease on sides increase downwardsincrease in all directionsnever increases
  • 8.
    Problem06Light year isa unit oftime speeddistance none of these
  • 9.
    Problem07A semiconductor doppedwith a donor impurity isp-typew-typen-p-n type p-n-p type
  • 10.
    Problem08A wire carryingcurrent I and other carrying 2Iin the same direction produces a magnetic B at the mid point. What will be the field when 2I wire is switched off?5/2 2BB 45
  • 11.
    Problem09What will beenergy stored in a strained wire? ½ x Load x extension½ x stress x strain ½ x load x strain½ x load x stress
  • 12.
    Problem10If error inmeasurement of radius of sphere 1%, what will be the error in measurement. volume?1% 1/3%3% 10%
  • 13.
    Problem11Minimum number ofunequal vectors which can give zero resultant aretwo threefour more than four
  • 14.
    Problem12A coin isdropped in a lift. It takes time t1 to reach the floor when lift is stationary. It takes time when lift is moving up with constant acceleration ThenT1 > T2T2 > T1T1=T2T1>>T2
  • 15.
    Problem13A large shipcan float but a steel needle sink because ofviscosity surface tensiondensity None of these
  • 16.
    Problem14In a solenoid,if number of turns is doubled, then self inductance will becomehalf doubled1/4 times quadruped
  • 17.
    Problem15Core of transformeris made up ofsoft iron steeliron alnico
  • 18.
    Problem16Transformer is basedupon the principle ofself induction mutual inductioneddy current none of these
  • 19.
    Problem17Refractive index ofmaterial is equal to tangent of polarising angle. It is calledBrewster's law Lambert's lawMalus's law Bragg's law
  • 20.
    Problem18A car acceleratesfrom rest at constant rate for 1st 10s. and covers a distance x. It covers a distance y in next 10 s at the same acceleration. Which of the following is true?x = 3y y = 3xx=y y = 2x
  • 21.
    Problem19The horizontal rangeof a projectile is 400 m. The maximum height attained by it will be100 m 200 m400 m800 m
  • 22.
    Problem20What determines thenature of the path followed by the particle?speed velocityacceleration none of these
  • 23.
    Problem21Which of thefollowing is not an example of perfectly inelastic collision?a bullet fired into a block if bullet gets embedded into blockcapture of electrons by an atoma man jumping on to a moving boata ball bearing striking another ball bearing
  • 24.
    Problem22The length ofseconds pendulum is 1 m on earth. If mass and diameter of the planet is doubled than that of earth, then length becomes1 m 2 m0.5 m 4 m
  • 25.
    Problem23Why the damof water reservoir is thick at the bottom?quantity of water increases with depthdensity of water increases with depthpressure of water increases with depthtemperature of water increases with depth
  • 26.
    Problem24A hot anda cold body are kept in vacuum separated from each other. Which of the following cause decrease in temperature of the hot body?radiation convectionconductiontemperature remains unchanged.
  • 27.
    Problem25When a tuningfork produces sound waves in air, which one of the following is same in the material of tuning fork as well as in air?wavelength frequencyvelocity amplitude
  • 28.
    Problem26A bomb explodeson the moon. How long will it take for the sound to reach the earth?10 s 1000 s1 day none of these
  • 29.
    Problem27What is theangle between the electric dipole moment and the electric field strength due to it on the equatorial line? 0° 90°180°none of these
  • 30.
    Problem28Which of thefollowing is not the property of equipotential surfaces?they do not cross each otherthey are concentric spheres for uniform electric fieldrate of change of potential with distance on them is zerothey can be imaginary spheres
  • 31.
    Problem29The potentials ofthe two plates of capacities are +10 V and - 1 0 V. The charge on one of the plates is 40 C. The capacitance of the capacitor is2 F 4 F0.5 F 0.25 F
  • 32.
    Problem30To draw maximumcurrent from a combination of cells, how should the cells be grouped?series parallelmixeddepends upon the relative values of external and internal resistance.
  • 33.
    Problem31A wire iscut into 4 pieces, which are put together by sides to obtain one conductor. If the original resistance of wire was R, the resistance of the bundle will beR/4 R/8R/16 R/32
  • 34.
    Problem32Which of thefollowing is not a property of light?it requires a material medium for propagationit can travel through vacuumit involves transportation of energyit has finite speed
  • 35.
    Problem33What causes changesin the colors of the soap or oil films for the given beam of light?angle of incidenceangle of reflectionthickness of film none of these
  • 36.
    Problem34What happens tothe fringe pattern when the Young's double slit experiment is performed in water instead of air?shrinks disappearunchanged enlarged
  • 37.
    Problem35Sir C. V.Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?scattering diffractioninterference polarisation.
  • 38.
    Problem36An object isplaced at a distance equal to focal length of convex mirror. If the focal length of the mirror be f, then the distance of the image from the pole of the mirror isless than fequal to fmore than finfinity
  • 39.
    Problem37Ability of theeye to see objects at all distances is calledbinocular vision myopiahypermetropiaaccommodation
  • 40.
    Problem38To increase magnifyingpower of telescope, we should increasethe focal length of the objectivethe focal length of the eyepieceaperture of the objectiveaperture of the eyepiece
  • 41.
    Problem39The magnitude ofsaturation photoelectric current depends uponFrequencyintensitywork function stopping potential
  • 42.
    Problem40Which of thefollowing is most unstable?electrons protonsneutrons a-particle
  • 43.
    Problem41After 2 hrs.,1/16th of initial amount of a certain radioactive isotope remains undecayed. The halflife of the isotope is15 min 30 min45 min 60 min
  • 44.
    Problem4210 g ofice at 0°C is mixed with 100 g of water at 50°C. What is the resultant temperature of mixture?31.2°C 32.8°C36.7°C 38.2°C
  • 45.
    Problem43An atomiser isbased on the application ofTorricelli's theoremBernouilli's theoremArchimedes principleprinciple of continuity
  • 46.
    Problem44"Pascal-second' has thedimensions offorce energypressurecoefficient of viscosity
  • 47.
    Problem45Consider the followingequation of Bernouilli's theorem. P+1/2 pV2+ pgh = K (constant). The dimensions of KIP are same as that of which of the following?thrust pressureangle viscosity
  • 48.
    Problem46What effect occurson the frequency of a pendulum if it is taken from the earth surface to deep into a mine?increases decreasesfirst increases then decreasesno effect
  • 49.
    Problem47The crystal ofdiamond shines due tohigh densitytotal internal reflectioncrystal lattice none of these
  • 50.
    Problem48The volume ofa cube in m3 is equal to the surface area of the cube in m2. The volume of the cube is64 m3216 m3512 m3196 m3
  • 51.
    Problem49An ice blockcontains a glass ball when the ice melts within the water containing vessel, the level of waterrises fallsunchangedfirst rises and then falls
  • 52.
    Problem50A beaker iscompletely filled with water at 4°C. It will overflow ifheated above 4°Ccooled below 4°Cboth heated and cooled above and below 4°C respectivelynone of the above
  • 53.
    For solution visitwww.vasista.net

Editor's Notes