Well below I have given you the AIIMS Entrance Exam previous question paper so you can have a look


AIIMS MBBS 2013 Previous Year Question Paper with Answers

Physics

1. To obtain a p-type germanium semiconductor, it must be doped with

(a) arsenic
(b) antimony
(c) Indium
(d) phosphorous

2. Sound waves do not.show the phenomenon of

(a) interference
(b) diffraction
(e) refraction
(d) polarisation



3. The magnifying power of a compound microscope is high If

(a) both me objective and the eyepiece has short focal lengths
(b) both the objectve and the eyepiece have long focal lengths
(c) the objective has a Short focal length and the eyepiece has a long focal length
(d)the objective has a long focal length and the eyepiece has a short focal length

4. 1 curie is

(a) 1 dps
(b) 3 x 1010dps
(c) 106 cos
(d) 3.7 x 1010dps

5. To double the covering range of a TV transmitter tower, its height should be made

(a) 2 times
(b) 4 times
(c) √2 times
(d) 8 times

6. An alternatmg voltage V = V0sin ωτ is applied across a circuit. As result I = I0 sin(ωτ)- π/2)flows ill it. The power consumed per cycle is



(a) zero
(b) 0.5 V0I0
(d) 0.707 V0I0
(d) 1.414 V0I0

7. A slab consist of two portions of different materials of same thickness and having the conductivities K1 and K2. The equivalent thermal conductivity of the slab is



8. A prism is made up 0f material of refractive index √3. The angle of prism is A. If the angle of minimum deviation is equal to the angle of the prism, then the value of A is
(a) 30o
(b) 45o
(c) 60o
(d) 75

10. The half-life of a radioactive substance is 10 day. This means that

(a) the substance completely disintegrates in 20 days.
(b) the substance completely disintegrates in 40 days.
(c) 1/8 part at the mass of the substance will be left intact at the end of 40 days
(d) 7/8 part of the mass of the substance disintegrates in 30 days.

11. A source and an observer are moving towards each other with a speed equal to υ/2, where υ is the speed of sound. The
source is emitting sound of frequency n.The frequency heard by one observer will be

(a) Zero
(b) n
(c) n/3
(d) 3n

12. Velocity of sound waves in air is 330 m/s. For a particular sound in air a path difference of 40 cm is equivalent to phase difference of 1.6π. The frequency of the wave is

(a) 165 Hz
(b) 150 Hz
(c) 660 Hz
(d) 330 Hz

13. The power factor of the circuit shown in figure is

(a) 0.2
(b) 0.4
(c) 0.8
(d) 0.6

14. A particle is executing linear simple harmonic motion amplitude A. What fraction of the total energy is kinetic when the displacement is half the amplitude.

(a) 1/4
(b) 1/2√2
(c) 1/2
(d) 3/4

15. Two simple harmonic motions are represented by y1=4sin(πt– π/2) and y2=3cos(4πt). The resultant amplitude is

(a) /
(b) 1
(c) 5
(d) 2+√3


17. When 20 J of work was done on gas. 40 J of heat energy was released If the initial energy of the gas was 70 J what is the final internal energy’?

(a) 50 J
(b) -150 J
(c) 90 J
(d) 110 J

18. The value of g at a particular point is 9.8 ms-2 Suppose the earth suddenly shrinks uniformly to half it resent size without losing any mass . The value of g at the same point (distance of the point from the centre of earth does not change) Will now be

(a) 9.8 ms-2
(b) 4.9 ms-2
(c) 19.6 ms-2
(d) 39.2 ms-2


20. The Young’s modulus of a wire of length L the radius r is y newton per square meter lf the length is reduced to L/2 and radius L/2 Its Young’s modulus will be

(a) y/2
(b) y
(c) 2y
(d) 4y

21. A boy of mass m stands on one end of a wooden plank of length L. and muss M The plank is floating on water, If the boy walks from one end of the plank to the other end at a constant speed the
resulting displacement of the plank is given by

(a) mL/M
(b) ML/m
(c) mL/M+m
(d) mL/M-m


28. Wind blowing from South at 10 m/s but to a cyclist it appears to be blowing from the East at 10 m/s The cyclist has a velocity

(a) 10i – 10j
(b) 10i + 10j
(c) – 10i + 10j
(d) – 10i – 10j


33. There are N cells in the circuit of figure. The emf and internal resistance of each cell is E and r respectively. The points A and B in the circuit divide the circuit into n and (N – n) cells. The current in the circuit is

(a) E/r
(b) nE/r
(c) NE/Nr
(d) Zero

36. The magnetic flux linked with the coil varies with time as φ = 3t24t + 9. The magnitude of the induced emf of 2s is

(a) 9 V
(b) 16 V
(c) 3 V
(d) 4 V

37. The force F is given by expression F = A cos(Bx) Csin(Dt), where x is the displacement and t is the time. Then dimension of D/B are same as that of

(a) velocity [LT-1]
(b) angular velocity[T-1]
(c) angular momentum[ML2T-1]
(d) velocity gradient[T-1]

38. The thermo cmf of a thermocouple varies with the temperature θ of the hot junction as
E = aθ.bθ2 volt
where the ratio (a/b) is 700°C. If the cold junction is kept at O°C, then the neutral temperature is

(a) 700°C
(b) 350°C
(c) 1400°C
(d) no neutral temperature is possible


40. Carbon, silicon and germanium are semiconductors having four valance e If their respective band gap energies between conduction and valence band are (Eg)c, (Eg)S1, (Eg)Ge

(a)(Eg)S1<(Eg)Ge<(Eg)c
(b)(Eg)c<(Eg)Ge>(Eg)S1
(c)(Eg)c>(Eg)S1>(Eg)Ge
(d)(Eg)c=(Eg)Ge=(Eg)S1

Directions (Q. Noa. 41 to 60) In each of the following questions, two statement are given One is assertion and the other is reason. Examine the statement carefully and mark the correct answer according to the instruction given below

(a)If both the assertion and reason are true and reason explains the assertion
(b)If both the assertion and reason are true but reason does not explain the assertion
(c)If assertion is true but reason is false
(d)If assertion is false but reason is true

41. Assertion In an elastic collision between two bodies. the energy of each body is conserved
Reason The total energy of an isolated system is conserved.

42. Assertion A body can he at rest even when it is under the action of any number of external forces
Reason Vector sum of all the external forces is zero

43. Assertion In a non-uniform circular motion, the acceleration of the particle is equal to sum of the tangential acceleration and the centripetal acceleration.
Reason The two acceleration are perpendicular to each other.

44. Assertion A body can have acceleration even if its velocity is zero at that instant of time.
Reason The body will be momentarily at rest when it reserves its direction of motion.

45. Assertion Work done in moving a charge between any two points in a uniform electric field is independent of the path followed by the charge. between these points.
Reason Electrostatic forces are non conservative

46. Assertion In a transistor amplifier. the output voltage is always nut of phase with the input voltage.
Reason The emitter base junction is reverse biased and the base collector Junction is forward biased

47. Assertion In case of pure rolling. the force of friction becomes zero.
Reason The speed at the point of contact is zero.

48. Assertion Heat from the sun reaches the earth by convection.
Reason Air can be heated only by convection.

49. Assertion A wire carrying an electric current has no electric field around it.
Reason Rate of flow of electron’s in one direction is equal to the rate of flow of protons in opposite direction.

50. Assertion If an electron and proton enter a perpendicular magnetic field with equal momentum, then radius of curve for electron is more than that of proton.
Reason Electron has less mass than proton.

51. Assertion The ratio Cp/Cvis more for helium gas than for hydrogen gas.

Reason Atomic mass of helium is more than that of hydrogen.

52. Assertion Our ears cannot distinguish two notes, one produced by a violin and other by a guitar. if they have exactly same intensity and same frequency.
Reason When a musical instrument is played, it produces a fundamental note which is accompanied by a number of overtones called harmonics.

53. Assertion The de-Broglie wavelength equation has significance for any microscopic and submicroscopic particles.
Reason de-Broglie wavelength is inversely proportional to the mass of the object its velocity is constant

54. Assertion In stationary wave, there is no transfer of energy.
Reason The ratio of kinetic energy to potential energy is independent of the position.

55. Assertion Electrons move from a region of higher potential to a region of lower potential.
Reason An electron has less potential energy at a point where potential is higher and vice.versa.

56. Assertion In a radioactive disintegration, an electron is emitted by the nucleus.
Reason Electron are present inside the nucleus.

57. Assertion A normal human eye can clearly see all the objects beyond a certain minimum distance.
Reason the human eye has the capacity to suitably adjust the focal length of its lens to a certain extent.

58. Assertion A satellite moving in a circular orbit around the earth has a total energy E0, then its potential energy is -E0
Reason Potential energy of the body at a Point In a gravitational field of orbit is –GMm/R

59. Assertion If a liquid in a vessel is stirred and left to itself. the motion disappear after few minutes.
Reason The moving liquid exerts equal and opposite force.

60. Assertion At the centre of earth u body has centre of mass, but no centre of gravity.
Reason This is because g=0 at the centre of