AIIMS Past Exam Paper Physics-2013
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Question 1 of 60
To obtain a p-type germanium semi-conductor, it must be doped withCorrectIncorrect
Question 2 of 60
Sound waves do not show the phenomenon ofCorrectIncorrect
Question 3 of 60
The magnifying power of a compound microscope is high ifCorrectIncorrect
Question 4 of 60
1 curie isCorrectIncorrect
Question 5 of 60
To double the covering range of a TV transmitter tower, its height should be madeCorrectIncorrect
Question 6 of 60
An alternative voltage V = V0 sin ωt is applied across a circuit. As result I =I0 sin(ωt – π/2) flows in it. The power consumed per cycle isCorrectIncorrect
Question 7 of 60
A slab consist of two portions o f different materials of same thickness and having the conductivities K1 and K2. The equivalent thermal conductivity of the slab isCorrectIncorrect
Question 8 of 60
A prism is made up of 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 isCorrectIncorrect
Question 9 of 60
Question 10 of 60
The half-life of a radioactive substance is 10 days. This means thatCorrectIncorrect
Question 11 of 60
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 beCorrectIncorrect
Question 12 of 60
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 isCorrectIncorrect
Question 13 of 60
The power factor of the circuit shown in figure isCorrectIncorrect
Question 14 of 60
A particle I s executing linear simple harmonic motion of amplitude A. What fraction of the total energy is kinetic when the displacement is half the amplitudeCorrectIncorrect
Question 15 of 60
Question 16 of 60
Three plates of common surface area A are connected as shown in figure. The effective capacitance will beCorrectIncorrect
Question 17 of 60
When 20 J of work was done on gas, 40 J of heat energy was released. If the initial internal energy of the gas was 70 J, what is the final internal energy?CorrectIncorrect
Question 18 of 60
The value of g at a particular point is 9.8 ms−2. Suppose the earth suddenly shrinks uniformly to half its present 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 beCorrectIncorrect
Question 19 of 60
A spherical ball is dropped in a long column of viscous liquid. Which of the following graphs represent the variation of
(i) gravitational force with time
(ii) viscous force with time
(iii) net force acting on the ball with time?CorrectIncorrect
Question 20 of 60
The Young’s modulus of a wire of length L and radius r is y newton per square meter. If the length is reduced to L/2 and radius L/2. Its Young’s modulus will beCorrectIncorrect
Question 21 of 60
A body of mass m stands on one end of a wooden plank of length L and mass 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 other end at a constant speed, the resulting displacement of the plank is given byCorrectIncorrect
Question 22 of 60
A sphere of solid material of relative density 9 has a concentric spherical cavity and just sinks in water. If the radius of sphere be R, then the radius of cavity (r) will be related to R asCorrectIncorrect
Question 23 of 60
Average value of kinetic energy and potential energy over entire time period in a SHM isCorrectIncorrect
Question 24 of 60
In which of the states shown in figure, is potential energy of a electric dipole maximum?CorrectIncorrect
Question 25 of 60
A car is travelling with a linear velocity v on a circular road of radius r. If it is increasing its speed at the rate of a m/s2, then the resultant acceleration will beCorrectIncorrect
Question 26 of 60
A uniform magnetic field parallel to the plane of paper, existed in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by figure.CorrectIncorrect
Question 27 of 60
A body starts from rest and moves with a uniform acceleration. The ratio of the distance covered in the nth second to the distance covered in n secondCorrectIncorrect
Question 28 of 60
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 velocityCorrectIncorrect
Question 29 of 60
The current i and voltage V graphs for a given metallic wire at two different temperatures T1 and T2are shown in the figure. It is concluded thatCorrectIncorrect
Question 30 of 60
The internal resistance of primary cell is 4 Ω. It generates a current of 0.2 A in an external resistance of 21 Ω. The rate at which chemical energy is consumed is providing the current isCorrectIncorrect
Question 31 of 60
Question 32 of 60
Question 33 of 60
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 isCorrectIncorrect
Question 34 of 60
The earth’s magnetic field at a certain place has a horizontal component of 0.3 G and total strength 0.5 G. Find angle of dip in tan−1CorrectIncorrect
Question 35 of 60
Two spherical conductors A and B of radii a and b (b > a) are placed concentrically in air. The two arc connected by a copper wire as shown in figure. The equivalent capacitance of the system isCorrectIncorrect
Question 36 of 60
The magnetic flux linked with the coil varies with time as ϕ = 3t2 + 4t + 9. The magnitude of the induced emf of 2s isCorrectIncorrect
Question 37 of 60
Question 38 of 60
The thermo emf of a thermocouple varies with the temperature θ of the hot junction as
E = aθ + bθ2 volt
where the ratio (a/b) is 700℃. If the cold junction is kept at 0℃, then the neutral temperature isCorrectIncorrect
Question 39 of 60
The wire shown is figure carries a current of 32 A. if r = 3.14 cm, the magnetic field at point P will beCorrectIncorrect
Question 40 of 60
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)Si, (Eg)Ge. ThenCorrectIncorrect
Question 41 of 60
Directions (Q. Nos. 41 to 60) In each of the following questions, two statement are given. One is assertion and the other is reason.
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.CorrectIncorrect
Question 42 of 60
Assertion A body can be 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.CorrectIncorrect
Question 43 of 60
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.CorrectIncorrect
Question 44 of 60
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 reverses its direction of motion.CorrectIncorrect
Question 45 of 60
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.CorrectIncorrect
Question 46 of 60
Assertion In a transistor amplifier, the output voltage is always out of phase with the input voltage.
Reason The emitter base junction is reverse biased and the base collector junction is forward biased.CorrectIncorrect
Question 47 of 60
Assertion In case of pure rolling, the force of friction becomes zero.
Reason The speed at the point of contact is zero.CorrectIncorrect
Question 48 of 60
Assertion Heat from the sun reaches the earth by convection.
Reason Air can be heated only by convection.CorrectIncorrect
Question 49 of 60
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 I opposite direction.CorrectIncorrect
Question 50 of 60
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.CorrectIncorrect
Question 51 of 60
Reason Atomic mass of helium is more than that of hydrogen.CorrectIncorrect
Question 52 of 60
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.CorrectIncorrect
Question 53 of 60
Assertion The d-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.CorrectIncorrect
Question 54 of 60
Assertion In stationary wave, there is no transfer of energy.
Reason The ratio of kinetic energy to potential energy is independent of the position.CorrectIncorrect
Question 55 of 60
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.CorrectIncorrect
Question 56 of 60
Assertion In a radioactive disintegration, an electron is emitted by the nucleus.
Reason Electron are present inside the nucleus.CorrectIncorrect
Question 57 of 60
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.CorrectIncorrect
Question 58 of 60
Assertion A satellite moving in a circular orbit around the earth has a total energy E0, then its potential energy is –E0.CorrectIncorrect
Question 59 of 60
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.CorrectIncorrect
Question 60 of 60
Assertion At the centre of earth a body has centre of mass, but no centre of gravity.
Reason This is because g = 0 at the centre of earth.CorrectIncorrect