AIIMS Past Exam Paper Physics – 2011
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Question 1 of 60
In Young’s double slit experiment carried out with wavelength λ = 5000 , the distance between the slits is 0.2 mm and the screen is 2 m away from the slits. The central maxima is at n = 0. The third maxima will be at a distance x (from central maxima) is equal toCorrectIncorrect
Question 2 of 60
A gang capacitor is formed by interclocking a number of plates as shown in figure. The distance between the consecutive plates is 0.885 cm and the overlapping area of the plates is 5 cm2. The capacity of the unit isCorrectIncorrect
Question 3 of 60
The freezer in a refrigerator is located at the top section so thatCorrectIncorrect
Question 4 of 60
A choke is preferred to a resistance for limiting current in AC circuit becauseCorrectIncorrect
Question 5 of 60
A thin prism P1 of angle 4° and refractive index 1.54° is combined with another thin prism P2 of refractive index 1.72 to produce dispersion without deviation. The angle of P2 isCorrectIncorrect
Question 6 of 60
What will be the number of photons emitted per second by a 10 W sodium vapour lamp assuming that 90% of the consumed energy is converted into light [Wavelength of sodium light is 590 nm, and h = 6.63 × 10−34 J-s]CorrectIncorrect
Question 7 of 60
200 MeV of energy may be obtained per fission of U235. A reactor is generating 100 kW of power. The rate of nuclear fission in the reaction isCorrectIncorrect
Question 8 of 60
As shown in the figure a magnet is moved with a fast speed towards a coil at rest. Due to this induced emf, induced current and induced charge in the coil is E, I and Q respectively. If the speed of the magnet is doubled, the incorrect statement isCorrectIncorrect
Question 9 of 60
Which one of the following is not made o soft iron ?CorrectIncorrect
Question 10 of 60
Two tangent galvanometer having coils of the same radius are connected in series. A current flowing in them produces deflection of 60° and 45° respectively. The ratio of the number of turns in the coils isCorrectIncorrect
Question 11 of 60
A bar magnet of magnetic moment 104 J/T is free to rotate in a horizontal plane. The work done in rotating the magnet slowly form a direction parallel to a horizontal magnetic field of 4 × 10−5 T to a direction of 60° from the field will beCorrectIncorrect
Question 12 of 60
An ideal coil of 10 H is joined in series with a resistance of 5 Ω and battery of 5 V, 2 s after joining the current flowing (in ampere) in the circuit will beCorrectIncorrect
Question 13 of 60
A rocket is fired upward from the earth surface such that it creates an acceleration of 19.6 m/s2. If after 5 s, its engine is switched off, the maximum height of the rocket from earth’s surface would beCorrectIncorrect
Question 14 of 60
A 60 kg weight is dragged on a horizontal surface by a rope through a distance of 2m. If coefficient of friction is μ = 0.5, the angle of rope with surface is 60° and g = 9.8 m/s2, then work done isCorrectIncorrect
Question 15 of 60
A small uncharged metallic sphere is positioned exactly at a point midway between two equal and opposite point charges. If the sphere is slightly displaced towards the positive charge and released thenCorrectIncorrect
Question 16 of 60
A capacitor of capacitance 5 μF is connected as shown in the figure. The internal resistance of the cell is 0.5Ω. The amount of charge on the capacitor plate isCorrectIncorrect
Question 17 of 60
The resistance of a circular coil of 50 turns and 10 cm diameter is 5 Ω. What must be the potential difference across the ends of the coil so as to nullify the earth’s magnetic field (H = 0.314 gauss) at the centre of the coil? How should the coil be placed to achieve this result?CorrectIncorrect
Question 18 of 60
If C and L denote the capacitance and inductance respectively, the units of LC areCorrectIncorrect
Question 19 of 60
Question 20 of 60
A body of mass 0.5 kg is projected under gravity with a speed of 98 m/s at an angle of 60° with the horizontal. The change in momentum (in magnitude) of the body isCorrectIncorrect
Question 21 of 60
Question 22 of 60
The dispersive powers of glasses of lenses used in an achromatic pair are in the ratio 5 : 3. If the focal length of the concave lens is 15 cm, then the nature and focal length of the other lens would beCorrectIncorrect
Question 23 of 60
A charge Q is divided into two part of q and Q−q. If the coulomb repulsion between them when they are separated is to be maximum, the ratio of Q/q should beCorrectIncorrect
Question 24 of 60
A rectangular vessel when full of water, takes 10 min to be emptied through an orifice in its bottom. How much time will it take to be emptied when half filled with water?CorrectIncorrect
Question 25 of 60
If there were no gravity, which of the following will not be there for a fluid?CorrectIncorrect
Question 26 of 60
A = 4i + 4J – 4k and B = 3i + j + 4k, then angle between vectors A and B isCorrectIncorrect
Question 27 of 60
Consider the following statements
(i)For a permanent magnet the area of a hysteresis loop is allowed to be large.
(ii)Coercivity of the material in permanent magnets should be small.
Which of the following statements is/are true?CorrectIncorrect
Question 28 of 60
Two capacitors of 10 μF and 20 μF are connected in series with a 30 V battery. The charge on the capacitors will be respectivelyCorrectIncorrect
Question 29 of 60
The magnetic field at P on the axis of a solenoid having 100 turn/m and carrying a current of 5 A isCorrectIncorrect
Question 30 of 60
Question 31 of 60
The velocity of sound in air at NTP is 330 m/s. What will be its value when temperature is doubled and pressure is halved?CorrectIncorrect
Question 32 of 60
Doppler’s effect is sound in addition of relative velocity between source and observer, also depends while source and observer or both are moving Doppler effect in light depend only on the relative velocity of source and observer. The reason of this isCorrectIncorrect
Question 33 of 60
If emf E = 4 cos 1000t volt is applied to an L-R circuit of inductance 3 mH and resistance 4Ω, the amplitude of current in the circuit isCorrectIncorrect
Question 34 of 60
Two coherent monochromatic light beams of intensities I and 4I superimpose. The maximum and minimum possible intensities in the resulting beam areCorrectIncorrect
Question 35 of 60
The X-ray tube is operated at 50 kV. The minimum wavelength produced isCorrectIncorrect
Question 36 of 60
The energy gap between conduction band and valence band is of the order of 0.07 eV. It is a/anCorrectIncorrect
Question 37 of 60
The earth circles around the sun once a year. The work which would have to be done on the earth to bring it to rest relative to the sun is, (Ignore the rotation of earth about its own axis) given that the mass of the earth = 6×1024 kg and distance between sun and earth is 1.5 × 108 km)CorrectIncorrect
Question 38 of 60
The rate of dissipation of heat by a black body at temperature T is Q. What will be the rate of dissipation of heat by another body at temperature 2T and emissivity 0.25?CorrectIncorrect
Question 39 of 60
A longitudinal wave is represented by
The maximum particle velocity will be four times the wave velocity, ifCorrectIncorrect
Question 40 of 60
The radius of gyration of a body about an axis at a distance of 6 cm from its centre of mass is 10 cm. Then, its radius of gyration about a parallel axis through its centre of mass will beCorrectIncorrect
Question 41 of 60
Direction (41-60) In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion The projectile has only vertical component of velocity at the highest point of its trajectory.
Reason At the highest point only one component of velocity present.CorrectIncorrect
Question 42 of 60
Assertion Thrust on a rocket depends not only on the rate of decrease of mass.
Reason Thrust also depends upon exhaust speed of the gases.CorrectIncorrect
Question 43 of 60
Assertion When a ball collides elastically with a floor, it rebounds with the same velocity as with it strikes.
Reason Momentum of earth + ball system remains constant.CorrectIncorrect
Question 44 of 60
Assertion When a body accelerates down an incline rolling purely. Static friction force acts on the body.
Reason Point of contact of the body with incline remains at rest.CorrectIncorrect
Question 45 of 60
Assertion A small drop of mercury is spherical but bigger drops are oval in shape.
Reason Surface tension of liquid decreases with increase in temperature.CorrectIncorrect
Question 46 of 60
Assertion Cp can be less than CV.
Reason CpCV = R is valid only for ideal gases.CorrectIncorrect
Question 47 of 60
Assertion Bulk modulus of elasticity B represents incompressibility of the material.CorrectIncorrect
Question 48 of 60
Assertion To float, a body must displace liquid whose weight is greater than actual weight of the body.
Reason During floating the body will experience no net downward force in that case.CorrectIncorrect
Question 49 of 60
Assertion It is hoffer over the top of a fire than at the same distance of the side.
Reason Air surrounding the fire conducts, more heat upward.CorrectIncorrect
Question 50 of 60
Assertion The molecules of a monoatomic gas has three degree of freedom.
Reason The molecules of a diatomic gas has five degree of freedom.CorrectIncorrect
Question 51 of 60
Assertion In a stationary wave, there is no transfer of energy.
Reason There is no outward motion of the disturbance from one particle to adjoing particle in a stationary wave.CorrectIncorrect
Question 52 of 60
Assertion Though large number of free electrons are present in the metal. Yet there is not current in the absence of electric field.
Reason In the absence of electric field electrons move randomly in all directions.CorrectIncorrect
Question 53 of 60
Assertion The value of temperature coefficient of resistance is positive is for metals.
Reason The temperature coefficient of resistance for insulator is also positive.CorrectIncorrect
Question 54 of 60
Assertion Magnetic field due to an infinite straight conductor varies inversely as the distance from it.
Reason The magnetic field at the centre of the circular coil in the following figure is zero.CorrectIncorrect
Question 55 of 60
Assertion The resistance of an ideal voltmeter should be infinite.
Reason The lower resistance of voltmeters gives a reading lower than the actual potential difference across the terminals.CorrectIncorrect
Question 56 of 60
Assertion The centripetal forces and centrifugal forces never cancel out.
Reason They do not act at the same time.CorrectIncorrect
Question 57 of 60
Assertion A quick collision between two bodies is more violent than a slow collision, even when the initial and final velocities are identical.
Reason The momentum is greater in first case.CorrectIncorrect
Question 58 of 60
Assertion The length of day is slowly increasing.
Reason The domient effect causing a slowdown in the rotation of the earth is the gravitational pulx of other planets in the solar system.CorrectIncorrect
Question 59 of 60
Assertion On a decay daughter nucleus shifts two places to the left from the parent nucleus.
Reason An alpha particle carries four units of mass.CorrectIncorrect
Question 60 of 60
Assertion When base region has larger width, the collector current increases.
Reason Electron hole combination in base result in increase of base current.CorrectIncorrect