This document contains a 50 question physics exam with multiple choice answers. The exam covers topics including optics, electricity, mechanics, heat, waves, and other core physics concepts. For each question, four possible answers are provided and the test-taker must select the single best answer.

1. AFMC–Past papersPHYSICS- UNSOLVED PAPER - 2005

2. 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

3. 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

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 kept outside in sunlight bursts off after sometime because ofincrease in pressureincrease in volume both (a) and (b)none of these

6. 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

7. Problem05Air is blown through a hole on a closed pipe containing liquid. Then the pressure willincrease on sides increase downwardsincrease in all directionsnever increases

8. Problem06Light year is a unit oftime speeddistance none of these

9. Problem07A semiconductor dopped with a donor impurity isp-typew-typen-p-n type p-n-p type

10. 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

11. 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

12. Problem10If error in measurement of radius of sphere 1%, what will be the error in measurement. volume?1% 1/3%3% 10%

13. Problem11Minimum number of unequal vectors which can give zero resultant aretwo threefour more than four

14. 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

15. Problem13A large ship can 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 transformer is made up ofsoft iron steeliron alnico

18. Problem16Transformer is based upon the principle ofself induction mutual inductioneddy current none of these

19. Problem17Refractive index of material is equal to tangent of polarising angle. It is calledBrewster's law Lambert's lawMalus's law Bragg's law

20. 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

21. Problem19The horizontal range of a projectile is 400 m. The maximum height attained by it will be100 m 200 m400 m800 m

22. Problem20What determines the nature of the path followed by the particle?speed velocityacceleration none of these

23. 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

24. 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

25. 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

26. 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.

27. 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

28. 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

29. 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

30. 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

31. 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

32. 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.

33. 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

34. 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

35. 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

36. Problem34What happens to the 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 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

39. Problem37Ability of the eye to see objects at all distances is calledbinocular vision myopiahypermetropiaaccommodation

40. 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

41. Problem39The magnitude of saturation photoelectric current depends uponFrequencyintensitywork function stopping potential

42. Problem40Which of the following 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 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

45. Problem43An atomiser is based on the application ofTorricelli's theoremBernouilli's theoremArchimedes principleprinciple of continuity

46. Problem44"Pascal-second' has the dimensions offorce energypressurecoefficient of viscosity

47. 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

48. 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

49. Problem47The crystal of diamond shines due tohigh densitytotal internal reflectioncrystal lattice none of these

50. 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

51. 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

52. 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

53. For solution visit www.vasista.net