General Physics MCQ Solved Paper for LSAT

1. A transformer
A. converts direct current into alternating current
B. converts alternating current into direct current
C. steps up or steps down a given alternating current voltage
D. supplies current with zero resistance
Answer : C

2. A pressure gauge for fluids is called
A. a hydrometer
B. a manometer
C. a lactometer
D. an anemometer
Answer : B

3. Heat transfer
A. cools the body that transfers it
B. heats the body that absorbs the heat
C. may change the physical state of the substance
D. All the above
Answer : D

4. When sound waves travel from one medium to another, the quantity which remains unchanged is its
A. speed
B. frequency
C. wavelength
D. All the above
Answer : B

5. The escape velocity of a satellite projected from the surface of the earth is independent of
A. the mass of earth
B. the mass of the satellite
C. the radius of the earth
D. gravitation of the earth
Answer : B

6. The unit of heat energy is
A. watt
B. degree
C. joule
D. erg
Answer : C

7. For detecting and, testing of small electric charges we use
A. an electrophorus
B. an electroscope
C. an electromagnet
D. an ammeter
Answer : B

8. The light from the star nearest to the sun reaches the earth in
A. 8 minutes
B. 4.3 years
C. 12 seconds
D. 24 hours
Answer : B

9. If a bar magnet is broken into two pieces
A. both pieces will lose their magnetism
B. one piece will have North Pole on both ends and the other South Pole on its both ends
C. each will remain a magnet with North Pole at one end and South Pole at the other
D. the longer piece will behave as a bar magnet while the smaller will have no magnetism at all
Answer : C

10. Under similar conditions of temperature and pressure, the velocity of sound is maximum in
A. helium
B. argon
C. hydrogen
D. oxygen
Answer : C

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

12. The orbit of Venus lies between those of
A. Mercury and Earth
B. Earth and Mars
C. Mars and Saturn
D. Mars and Jupiter
Answer : A

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

14. In the visible spectrum which colour has the shortest wavelength?
A. Red
B. Blue
C. Yellow
D. Violet
Answer : D

15. The inability of a body to change its state of rest or uniform motion along a straight line is called its
A. momentum
B. velocity
C. acceleration
D. inertia
Answer : D

16. The filament used in the electric lamp is made of
A. nichrome
B. tungsten
C. copper
D. aluminium
Answer : B

17. The cover of a solar cooker is made of glass because
A. it absorbs sun's rays
B. it reflects sun's rays
C. it retains the heat inside by the greenhouse effect
D. it radiates heat better than metals
Answer : C

18. To concentrate light on the defective teeth, the dentists use
A. convex mirrors
B. concave mirrors
C. convex lens
D. concave lens
Answer : B

19. 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

20. The tiniest of the stars belong to the group known as
A. Giant stars
B. White Dwarf stars
C. Neutron stars
D. Super-giant stars
Answer : C

21. 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

22. A cyclist leans inwards when he is negotiating a curve 10 that
A. he may increase his speed
B. his weight may be reduced
C. necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion
D. no frictional force may be produced between the wheels and the axle
Answer : C

23. Sun spots are
A. the mountains found on the surface of the Sun
B. the dark patches on the sun having less temperature than the normal sun's surface
C. ionized gas found near the solar surface
D. the magnetic storms on the surface of the Sun
Answer : B

24. The transistor was invented by
A. Marconi
B. Baird
C. John Bardeen, Walter H. Brattain and William Shockley
D. Edison
Answer : C

25. For viewing objects placed at a higher level from a position at a lower level, the instrument used' Is known aa
A. telescope
B. spectrometer
C. microscope
D. periscope
Answer : D

26. Which metal is used in storage batteries?
A. Copper
B. Lead
C. Tin
D. Iron
Answer : B

27. In the electrical circuit of a house the fuse acts as
A. a thermopile
B. a load
C. a step down device
D. a safety device
Answer : D

28. Mercury is used in thermometers because
A. it has high thermal conductivity
B. it has uniform expansivity
C. it has high boiling point and low freezing point
D. of all the above
Answer : D

29. Less dew is formed on cloudy nights because
A. there is no moisture in the atmosphere
B. clouds absorb the falling dew
C. objects emit radiant energy very fast on such nights
D. objects lose less radiant energy
Answer : D

30. The audible range of a normal human ear is frequencies ranging from
A. 10000 to 20000 Hz
B. 50 to 15000 Hz
C. 20 to 20000 Hz
D. 15 to 50000 Hz
Answer : C

31. In which of the following will a piece of iron weigh most?
A. in air
B. in an atmosphere of oxygen
C. in an atmosphere of CO2
D. in vacuum
Answer : D

32. Which of the following rays has the highest penetrative power?
A. a -rays
B. � -rays
C. ? -rays
D. X-rays
Answer : C

33. At what temperature do the Fahrenheit and Celsius scales give the same reading?
A. 212°
B. 32°
C. -40°
D. 0°
Answer : C

34. Out of the following which element has the longest half-life period?
A. Radium
B. Radon
C. Uranium-238
D. Plutonium
Answer : C

35. 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

36. When light travels from one medium to another there is a change in its
A. velocity
B. wavelength
C. frequency
D. Both (a) and (b) above
Answer : D

37. 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

38. A stationary elevated object has
A. kinetic energy
B. potential energy
C. momentum
D. both potential and kinetic energy
Answer : B

39. 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

40. A pair of stars that revolve round each other is
A. a neutron star
B. a binary star
C. a dwarf star
D. a polar star
Answer : B

41. The direction of heat flow between two objects depends on
A. their heat contents
B. their masses
C. their temperatures
D. whether they are in solid, liquid or gaseous state
Answer : C

42. Air pressure is usually highest when the air is
A. warm and moist
B. cool and dry
C. warm and dry
D. cool and moist
Answer : D

43. The force that keeps a body in a circular motion is called
A. the centripetal force
B. the centrifugal force
C. the frictional force
D. All the above
Answer : A

44. Cosmic rays contain
A. protons and electrons
B. alpha particles
C. gamma rays
D. All the above
Answer : D

45. When ice melts, Its volume
A. decreases
B. increases
C. remains the same until all the ice has melted and then increases
D. remains the same
Answer : A

46. A light year means
A. a unit of time
B. a unit of length
C. a year of no consequence
D. illumination throughout the year
Answer : B

47. The rate of cooling of a hot body depends on
A. the nature of the radiating surface
B. area of the radiating surface
C. temperature difference between the body and the surroundings
D. All the above
Answer : D

48. 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

49. Halley's comet appears in the heavens once in
A. 40 years
B. 50 years
C. 76 years
D. 80 years
Answer : C

50. When a body Is taken to the poles from the equator, Its weight becomes
A. greater
B. less
C. the same
D. None of these
Answer : A