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# AFMC Physics 2001

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• ### AFMC Physics 2001

1. 1. AFMC–Past papers<br />PHYSICS- UNSOLVED PAPER - 2001<br />
2. 2. SECTION – A<br />Single Correct Answer Type<br />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<br />
3. 3. Problem<br />01<br />A body is being rotated in a horizontal circle with constant angular velocity. Which of these is always constant?<br />Velocity <br />Acceleration<br />Force<br />Kinetic energy<br />
4. 4. Problem<br />02<br />A sphere thrown from a flying aero plane shows path<br />Parabolic<br />Circular<br />Straight line<br />Spiral<br />
5. 5. Problem<br />03<br />Pascal second is a unit of<br />Energy<br />Young's modulus<br />Stress<br />viscosity<br />
6. 6. Problem<br />04<br />A body is dropped from an aero plane flying horizontally at 250 km/'hr at an altitude of 980 m. Time of fall is<br />10 seconds <br />12 seconds<br />14.15 seconds<br />17.33 seconds<br />
7. 7. Problem<br />05<br />Which of these travels in the glass with minimum velocity?<br />Violet light<br />Green light<br />Yellow light<br />Red light<br />
8. 8. Problem<br />06<br />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<br />1.5<br />2.25<br />3.375 <br />4<br />
9. 9. Problem<br />07<br />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<br />9 : 1<br />27 : 1<br />81 : 1 <br />3 : 1<br />
10. 10. Problem<br />08<br />Which of these waves can be polarized?<br />Sound waves<br />Longitudinal waves on a string<br />Transverse waves on a string<br />Light waves<br />
11. 11. Problem<br />09<br />A body of mass 2 kg falls from a height of 20 m. What is the loss in potential energy? ( g = 10 ms-2)<br />400 J<br />300 J<br />200 J<br />100 J<br />
12. 12. Problem<br />10<br />Weight of a body is maximum at<br />Pole<br />Equator<br />Centre of earth<br />Moon<br />
13. 13. Problem<br />11<br />A simple pendulum is taken to a height and thrown so that its falls freely under gravity. Then its frequency of oscillation becomes<br />Doubles<br />Halves<br />Zero<br />Uncertain<br />
14. 14. Problem<br />12<br />Induced e.m.f. is the rate of change of magnetic flux is a statement of<br />Pascal's law<br />Faraday's law<br />Coulomb's law <br />Lenz's law<br />
15. 15. Problem<br />13<br />Distance of a geostationary satellite from the surface of earth is<br />6R <br />7R<br /> 5 R <br />3R<br />
16. 16. Problem<br />14<br />Current carriers in metals are<br />Electrons<br />-ve ions<br />+ve ions <br />Protons<br />
17. 17. Problem<br />15<br />Unit of gravitational potential is<br />Joule <br />Joule/kilogram<br />Joule kilogram <br />Kilogram<br />
18. 18. Problem<br />16<br />Magnetism of a magnet is due to<br />Cosmic rays<br />Large magnet at the centre of earth<br />Spins of electrons<br />Gravitation<br />
19. 19. Problem<br />17<br />A freely suspended bar magnet aligns itself in<br />A direction<br />A particular direction<br />Any direction<br />Depends on mass of the magnet<br />
20. 20. Problem<br />18<br />Spherical shape of a water drop is due to<br />Surface tension <br />Adhesion<br />Gravity <br />Density<br />
21. 21. Problem<br />19<br />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?<br />Wavelength<br />Energy<br />Velocity<br />Number of electrons<br />
22. 22. Problem<br />20<br />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<br />40 km/hr <br />25 km/hr<br />20 km/hr <br />45 km/hr<br />
23. 23. Problem<br />21<br />Who wrote the book "Principia"?<br />Maxwell<br />Marconi<br />Newton <br />Einstein<br />
24. 24. Problem<br />22<br />The half life of an element is 160 days. What amount of it will be decayed in 800 days?<br />1/32<br />1/16<br />1/2<br />1/8<br />
25. 25. Problem<br />23<br />What is the time taken by the moonlight to reach earth?<br />8 sec<br />10 sec<br />9 sec<br />None of these<br />
26. 26. Problem<br />24<br />What is the time taken by moon to complete one revolution of the earth?<br />29 days<br />20 1/2days<br />30 days<br />30 1/2 days.<br />
27. 27. Problem<br />25<br />The temperature on Celcius scale is 25°C. What is the corresponding temperature on the Fahrenheit scale?<br />40°F <br />77°F<br />50°F<br />45°F<br />
28. 28. Problem<br />26<br />23592X->20782Y<br />How many alpha and beta particles are emitted in the above reaction?<br />3α, 4β <br />7α, 4 β<br />4α, 7β <br />7α, 2β<br />
29. 29. Problem<br />27<br />What is ozone hole?<br />Hole in the ozone layer<br />Formation of ozone layer<br />Thinning of ozone layer in troposphere<br />Reduction in ozone thickness in stratosphere<br />
30. 30. Problem<br />28<br />To an astronaut in space the sky will appear as<br />Blue<br />Black<br />Violet<br />Dark blue<br />
31. 31. Problem<br />29<br />Hydraulic brakes work on the principle of<br />Pascal's Law <br />Thomson's law<br />Newton's law <br />Bernouli'stheorem<br />
32. 32. Problem<br />30<br />The heating effect of atmosphere is due to<br />Ultraviolet rays <br />Infrared rays<br />Carbon dioxide<br />Both (b) and (c)<br />
33. 33. Problem<br />31<br />C.V. Raman got Nobel Prize for his experiment on<br />Dispersion of light<br />Reflection of light<br />Deflection of light<br />Scattering of light<br />
34. 34. Problem<br />32<br />Dalton's atomic theory was in accordance with<br />Conservation of energy<br />Conservation of mass<br />Conservation of charge<br />None of these<br />
35. 35. Problem<br />33<br />Initially a body is at rest. If its acceleration is 5 ms-2, then calculate the distance travelled in the 18th second?<br />86.5 m<br />87.5 m<br />88 m<br />89 m<br />
36. 36. Problem<br />34<br />If a bomb blasts in air and is broken into several pieces, then the path travelled by centre of mass will be<br />Parabolic<br />Straight line<br />Circular <br />Zig-zag<br />
37. 37. Problem<br />35<br />Big waves of sea due to earthquakes are called<br />Tornado <br />Hurricane<br />Zizyphy<br />Tsunami<br />
38. 38. Problem<br />36<br />Ohms law is not applicable for<br />Insulators<br />Semiconductors<br />Arc lamp<br />All of the above<br />
39. 39. Problem<br />37<br />Newton gave corpuscular theory on the basis of<br />Newton's rings<br />Rectilinear motion<br />Certain corpuscles<br />Wave front<br />
40. 40. Problem<br />38<br />Water is used to cool radiators of engines, Because<br />Of its lower density<br />It is easily available<br />It is cheap<br />It has high specific heat<br />
41. 41. Problem<br />39<br />Brakes of very small contact area are not used although friction is independent of area, because friction<br />Resists motion<br />Causes wear and tear<br />Depends upon nature of the materials<br />Operating in this case is sliding friction<br />
42. 42. Problem<br />40<br /> Which of the following is a consequence of conservation of energy?<br />Archimedes's principle<br />Pascal's law <br />Bernoulli's theorem<br />Torricelli's theorem<br />
43. 43. Problem<br />41<br />Which is a vector quantity?<br />Magnetic field intensity<br />Magnetic field<br />Magnetic flux<br />Flux density<br />
44. 44. Problem<br />42<br />Particle that travels with a speed greater than that of light is<br />Lepton <br />Peon<br />Meson<br />None of these<br />
45. 45. Problem<br />43<br />The equipment which has both primary and secondary coils wound over a single core is<br />Resistor <br />Transistor<br />Radio <br />Transformer<br />
46. 46. Problem<br />44<br />Power has transmitted at a high voltage in supply line so as to<br />Deliver more power<br />Supply more current<br />Produce more energy<br />Prevent heat loss<br />
47. 47. Problem<br />45<br />Which one is not correctly matched?<br />Temperature - thermometer<br />Atmospheric pressure - barometer<br />Water in milk - lactometer<br />Humidity - calorimeter<br />
48. 48. Problem<br />46<br />Surface tension is due to<br />Elastic force<br />Gravitational force<br />Adhesive force<br />Cohesive force<br />
49. 49. Problem<br />47<br />The efficiency of a Carnot engine working between 800 K and 500 K is<br />0.625 <br />0.375<br />0.4<br />0.5<br />
50. 50. Problem<br />48<br />When a tuning fork vibrates, the waves produced in the fork are<br />Longitudinal<br />Transverse<br />Progressive <br />Stationary<br />
51. 51. Problem<br />49<br />The most important characteristics of electron in the production of X-Rays is<br />Revolution of electron around the nucleus<br />Mass of electron <br />Charge of electron<br />Speed of electron<br />
52. 52. Problem<br />50<br />On mixing soluble salt in water, the surface tension of water will<br />Decrease<br />Increase<br />Becomes zero <br />Becomes infinity<br />
53. 53. For solution visit www.vasista.net<br />