LIC AAO - General Physics 1000+ MCQ [Solved] PDF Download

1. A person cups his hand around the mouth when shouting. Why?
A. Sound energy from his mouth is then directed in one direction
B. The cupped hand acts as a cardboard tube of short length
C. The pitch of sound increases
D. Both (a) and (b)
Answer : D

2. A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be
A. a parabola
B. a horizontal straight line
C. a vertical straight line
D. a circle
Answer : A

3. The heat produced in a conductor due to the passage of a current through it is proportional to
A. the square of the current
B. the resistance of the conductor
C. the time for which the current flows
D. All the above
Answer : D

4. Nichrome is used in electric heaters and irons because
A. it resists oxidation when red hot
B. its melting point is high
C. it has got 60 times the resistance of copper
D. All the above
Answer : D

5. Which physical quantity is measured in watts
A. power
B. kinetic energy
C. momentum
D. impulse
Answer : A

6. When a satellite la In a geostationary orbit the force keeping it in orbit Is
A. zero
B. the centrifugal force
C. reaction due to steady burning of fuel
D. the gravitational pull on the body by the earth is the weight of the body which provides the centripetal force
Answer : D

7. Compared to the atomic bomb, the destructive power of a hydrogen bomb is
A. greater
B. less
C. equal
D. can't be determined
Answer : A

8. Of the following which has got the highest frequency?
A. ultraviolet rays
B. gamma rays
C. radio waves
D. infrared waves
Answer : B

9. The evaporation rate depends on
A. the nature of the liquid
B. area of the exposed surface of the liquid
C. temperature of air and of the liquid
D. All the above
Answer : D

10. The instrument used to measure atmospheric pressure is
A. Pyrometer
B. Eudiometer
C. Barometer
D. Hydrometer
Answer : C

11. An electric kettle used for boiling hard water has a white scale deposited on its heating element. This consists or
A. sugar
B. sodium carbonate
C. common salt
D. carbonates of calcium and magnesium
Answer : D

12. The temperature, surface features, length of days and nights of a planet depend on
A. its atmosphere
B. its distance from the sun
C. its rotation
D. All the above
Answer : D

13. A balloon ruled with hydrogen will
A. continue going upwards uninterrupted
B. reach a particular height and remain floating
C. burst after reaching some height
D. reach a particular height and start coming down
Answer : B

14. The SI unit of electric current is
A. the ampere
B. the volt
C. the ohm
D. the coulomb
Answer : A

15. Which of the following can produce electricity?
A. resistor
B. thermocouple
C. light bulb
D. neon tube
Answer : B

16. When a ship floats on water, the weight or water displaced is
A. an indeterminate quantity
B. equal to the weight of the ship
C. greater than the weight of the ship
D. less than the weight of the ship
Answer : B

17. Which part of the eye photographic camera?
A. Lens
B. Iris
C. Retina
D. Eyelid
Answer : D

18. In the nucleus of an atom, the uncharged particle is
A. proton
B. neutron
C. electron
D. positron
Answer : B

19. The motion .of the pendulum of a wall clock is an example of
A. linear motion
B. vibratory motion
C. rotational motion
D. None of the above
Answer : B

20. Astigmatism, a structural defect of the eye, is due to
A. the eye lens being thin
B. the eye lens being thick
C. lack of symmetry in the curvature of the eye preventing rays of light from being brought to a common focus
D. the pupil being very small
Answer : C

21. An ohm is a unit of
A. potential difference
B. resistance
C. current
D. All the above
Answer : B

22. A timer in a race is at the finish line. He should start his stop watch
A. as soon as he hears the report of the gun
B. the moment he sees the flash
C. either (a) or (b) since that makes no difference
D. None of the above
Answer : B

23. Enriched uranium means
A. Uranium that is very pure
B. Uranium in which the concentration of the isotope U-238 is more than in the naturally occuring uranium
C. Uranium in which the concentration of the isotope U-235 is more than in the naturally occuring uranium
D. None of the above
Answer : C

24. An electric kettle used for boiling hard water has a white scale deposited on its heating element. This consists or
A. sugar
B. sodium carbonate
C. common salt
D. carbonates of calcium and magnesium
Answer : D

25. Gamma radiations are used for
A. sterilising food stuff
B. controlling pests
C. cancer therapy
D. All of these
Answer : D

26. The freezer in a refrigerator is placed near the top
A. to keep it away from the hot compressor which is near the bottom
B. because of convenience
C. so that it can cool the whole interior by setting up convection currents
D. to prevent too much cooling
Answer : C

27. In very cold countries alcohol is used as a thermometric liquid because
A. alcohol is a poor conductor of heat
B. alcohol can be coloured for its level to be seen easily
C. its freezing point is very low
D. it will not stick to the glass tube
Answer : C

28. A device used in a ship for the purpose of measuring the depth of the sea is
A. an altimeter
B. a fathometer
C. a hydrometer
D. a sonometer
Answer : B

29. The resistance of a wire depends on
A. the material of the wire
B. the length of the wire
C. the cross section of the wire
D. All the above
Answer : D

30. In hot climatic conditions, the buildings are painted white because
A. white paint is economical
B. it does not fade off
C. it does not crack with higher temperature
D. white coating is a bad conductor of heat and reflects heat rays that fall on it, thus keeping the inside cool
Answer : D

31. A nuclear reactor is said to have become 'critical' when
A. it stops due to malfunctioning
B. it starts emitting dangerous radioactive radiations
C. it is shut down to avoid explosion
D. it is ready to produce controlled energy
Answer : D

32. The nuclear model of atom was first visualised by
A. Rutherford
B. Neils Bohr
C. Albert Einstein
D. JJ Thompson
Answer : A

33. The acoustical quality of a room depends on
A. the size and shape of the room
B. the ability of the ceiling, walls and floor to exclude unwanted sound
C. the use of furnishings made of sound absorbing materials
D. All the above
Answer : D

34. An electric charge is measured in
A. coulomb
B. ampere
C. volt
D. watt
Answer : A

35. The Solar System lies near the edge of a galaxy known as
A. The Milky Way
B. Radio Galaxy
C. Andromeda Nebula
D. Magellanic Clouds
Answer : A

36. Which of the following rays has the highest penetrative power?
A. �± -rays
B. �² -rays
C. �³ -rays
D. X-rays
Answer : C

37. The theory that the earth constituted the centre of the universe around which the sun and the planets revolved was propounded by
A. Copernicus
B. Ptolemy
C. Newton
D. Kepler
Answer : B

38. The cell that can be recharged, after it has run down, by passing a direct current through it from a source of current is
A. Voltaic cell
B. Leclanche cell
C. Dry cell
D. An accumulator
Answer : D

39. Of the following types of electromagnetic radiation which has the longest wavelength?
A. ultraviolet rays
B. gamma rays
C. radio waves
D. infrared waves
Answer : C

40. The study of astronomy include a
A. astrology
B. astrophysics
C. astrometry
D. Both (b) and (c) above
Answer : D

41. When water is cooled from 4�C to 2�C its density
A. increases
B. decreases
C. remains the same
D. first increases then decreases
Answer : B

42. The numerical reading of the Fahrenheit thermometer of a given temperature
A. is proportional to that of the Celsius thermometer
B. is always greater than that of the Celsius thermometer
C. is always less than that of the Celsius thermometer
D. may be greater than or less than or equal to that of the Celsius thermometer
Answer : D

43. Powder clings to the skin because of
A. cohesion
B. adhesion
C. capillary action
D. absorption
Answer : B

44. The overhead wires supported by high towers in the grid system carry
A. alternating current of very high frequency
B. alternating current of very high voltage
C. a very large direct current
D. a high voltage direct current
Answer : B

45. A bar magnet tied in the middle with a thread is suspended at the South Pole of the earth. The magnet will be in
A. a horizontal position
B. a nearly vertical position with its South Pole downwards
C. a nearly vertical position with its North Pole downwards
D. a slanting position
Answer : C

46. When a swing is drawn to a side Its potential energy In relation to the earth
A. increases
B. decreases
C. remains the same
D. is constant
Answer : A

47. One can be recognised by his voice alone due to the factor of
A. quality
B. amplitude
C. pitch
D. loudness
Answer : A

48. The largest planet in the solar system is
A. Neptune
B. Uranus
C. Jupiter
D. Saturn
Answer : C

49. The solar wind is composed of
A. outward stream of protons and electrons on the surface of the sun during solar flares and sun-spot activity
B. plasma
C. ionized gas
D. All of these
Answer : A

50. The planet that is known as earth's twin is
A. Mercury
B. Venus
C. Moon
D. Mars
Answer : B