AFMC Physics 2001

AFMC–Past papers PHYSICS- UNSOLVED PAPER - 2001

SECTION – A Single Correct Answer Type There 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

Problem 01 A body is being rotated in a horizontal circle with constant angular velocity. Which of these is always constant? Velocity Acceleration Force Kinetic energy

Problem 02 A sphere thrown from a flying aero plane shows path Parabolic Circular Straight line Spiral

Problem 03 Pascal second is a unit of Energy Young's modulus Stress viscosity

Problem 04 A body is dropped from an aero plane flying horizontally at 250 km/'hr at an altitude of 980 m. Time of fall is 10 seconds 12 seconds 14.15 seconds 17.33 seconds

Problem 05 Which of these travels in the glass with minimum velocity? Violet light Green light Yellow light Red light

Problem 06 Two soaps A and B are given. Dimensions of B are 50% more each than dimension of A. Soap content of B as compared to A is 1.5 2.25 3.375 4

Problem 07 A wire is stretched so that its radius becomes one-third of the original value. The value of resistance as compared to original volume is 9 : 1 27 : 1 81 : 1 3 : 1

Problem 08 Which of these waves can be polarized? Sound waves Longitudinal waves on a string Transverse waves on a string Light waves

Problem 09 A body of mass 2 kg falls from a height of 20 m. What is the loss in potential energy? ( g = 10 ms-2) 400 J 300 J 200 J 100 J

Problem 10 Weight of a body is maximum at Pole Equator Centre of earth Moon

Problem 11 A simple pendulum is taken to a height and thrown so that its falls freely under gravity. Then its frequency of oscillation becomes Doubles Halves Zero Uncertain

Problem 12 Induced e.m.f. is the rate of change of magnetic flux is a statement of Pascal's law Faraday's law Coulomb's law Lenz's law

Problem 13 Distance of a geostationary satellite from the surface of earth is 6R 7R 5 R 3R

Problem 14 Current carriers in metals are Electrons -ve ions +ve ions Protons

Problem 15 Unit of gravitational potential is Joule Joule/kilogram Joule kilogram Kilogram

Problem 16 Magnetism of a magnet is due to Cosmic rays Large magnet at the centre of earth Spins of electrons Gravitation

Problem 17 A freely suspended bar magnet aligns itself in A direction A particular direction Any direction Depends on mass of the magnet

Problem 18 Spherical shape of a water drop is due to Surface tension Adhesion Gravity Density

Problem 19 When an electron-beam is incident on a metal target, then the intensity of X-rays produced depends on which property of incident electron beam? Wavelength Energy Velocity Number of electrons

Problem 20 A 100 m long train crosses a man travelling at 5 km/hr, in opposite direction, in 7.2 seconds then the velocity of train is 40 km/hr 25 km/hr 20 km/hr 45 km/hr

Problem 21 Who wrote the book "Principia"? Maxwell Marconi Newton Einstein

Problem 22 The half life of an element is 160 days. What amount of it will be decayed in 800 days? 1/32 1/16 1/2 1/8

Problem 23 What is the time taken by the moonlight to reach earth? 8 sec 10 sec 9 sec None of these

Problem 24 What is the time taken by moon to complete one revolution of the earth? 29 days 20 1/2days 30 days 30 1/2 days.

Problem 25 The temperature on Celcius scale is 25°C. What is the corresponding temperature on the Fahrenheit scale? 40°F 77°F 50°F 45°F

Problem 26 23592X->20782Y How many alpha and beta particles are emitted in the above reaction? 3α, 4β 7α, 4 β 4α, 7β 7α, 2β

Problem 27 What is ozone hole? Hole in the ozone layer Formation of ozone layer Thinning of ozone layer in troposphere Reduction in ozone thickness in stratosphere

Problem 28 To an astronaut in space the sky will appear as Blue Black Violet Dark blue

Problem 29 Hydraulic brakes work on the principle of Pascal's Law Thomson's law Newton's law Bernouli'stheorem

Problem 30 The heating effect of atmosphere is due to Ultraviolet rays Infrared rays Carbon dioxide Both (b) and (c)

Problem 31 C.V. Raman got Nobel Prize for his experiment on Dispersion of light Reflection of light Deflection of light Scattering of light

Problem 32 Dalton's atomic theory was in accordance with Conservation of energy Conservation of mass Conservation of charge None of these

Problem 33 Initially a body is at rest. If its acceleration is 5 ms-2, then calculate the distance travelled in the 18th second? 86.5 m 87.5 m 88 m 89 m

Problem 34 If a bomb blasts in air and is broken into several pieces, then the path travelled by centre of mass will be Parabolic Straight line Circular Zig-zag

Problem 35 Big waves of sea due to earthquakes are called Tornado Hurricane Zizyphy Tsunami

Problem 36 Ohms law is not applicable for Insulators Semiconductors Arc lamp All of the above

Problem 37 Newton gave corpuscular theory on the basis of Newton's rings Rectilinear motion Certain corpuscles Wave front

Problem 38 Water is used to cool radiators of engines, Because Of its lower density It is easily available It is cheap It has high specific heat

Problem 39 Brakes of very small contact area are not used although friction is independent of area, because friction Resists motion Causes wear and tear Depends upon nature of the materials Operating in this case is sliding friction

Problem 40 Which of the following is a consequence of conservation of energy? Archimedes's principle Pascal's law Bernoulli's theorem Torricelli's theorem

Problem 41 Which is a vector quantity? Magnetic field intensity Magnetic field Magnetic flux Flux density

Problem 42 Particle that travels with a speed greater than that of light is Lepton Peon Meson None of these

Problem 43 The equipment which has both primary and secondary coils wound over a single core is Resistor Transistor Radio Transformer

Problem 44 Power has transmitted at a high voltage in supply line so as to Deliver more power Supply more current Produce more energy Prevent heat loss

Problem 45 Which one is not correctly matched? Temperature - thermometer Atmospheric pressure - barometer Water in milk - lactometer Humidity - calorimeter

Problem 46 Surface tension is due to Elastic force Gravitational force Adhesive force Cohesive force

Problem 47 The efficiency of a Carnot engine working between 800 K and 500 K is 0.625 0.375 0.4 0.5

Problem 48 When a tuning fork vibrates, the waves produced in the fork are Longitudinal Transverse Progressive Stationary

Problem 49 The most important characteristics of electron in the production of X-Rays is Revolution of electron around the nucleus Mass of electron Charge of electron Speed of electron

Problem 50 On mixing soluble salt in water, the surface tension of water will Decrease Increase Becomes zero Becomes infinity

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AFMC Physics 2001

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