1000+ General Physics Multiple Choice Question Answer [Solved]

1. Increase in pressure
A. increases the melting point of ice
B. decreases the melting point of ice
C. has no effect on the melting point of ice
D. increases the volume of the ice
Answer : B

2. Out of the following, name the fluorescent substance.
A. quinine sulphate solution
B. paraffin oil
C. fluorescein solutions
D. All the above
Answer : D

3. The presence of impurities
A. lowers the melting point of ice
B. raises the melting point of ice
C. has no effect on the melting point of ice
D. may lower or raise the melting point depending upon the type of impurities
Answer : A

4. In an electrical circuit, a fuse is connected
A. in the live wire
B. in the neutral wire
C. in the earth wire
D. anywhere
Answer : A

5. 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

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

7. The atmosphere gets heated up mainly by
A. direct sun's rays
B. radiation from earth's surface
C. radiogenic heat (resulting from radioactive decay)
D. cosmic rays coming from space
Answer : B

8. 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

9. The body of an electrical appliance is earthed in order that
A. electricity may not leak
B. there may be smooth flow of electricity
C. a short circuit may be prevented
D. current may pass to the earth in case of a short circuit without doing any harm to the person
Answer : D

10. The rocket engine is motivated by jet propulsion which uses the famous
A. Kepler's Laws
B. Newtonian Third Law of Motion
C. Bernoulli's Principle
D. Law of Relativity
Answer : B

11. When a bullet is fired from a gun
A. the gun moves forward
B. the gun jumps up
C. the gun does not move
D. the gun recoils with the same momentum as the bullet
Answer : D

12. The atmosphere gets heated up mainly by
A. direct sun's rays
B. radiation from earth's surface
C. radiogenic heat (resulting from radioactive decay)
D. cosmic rays coming from space
Answer : B

13. Mica is used in an electric iron because it is a
A. good conductor of heat
B. good conductor of electricity
C. bad conductor of electricity
D. Both (a) and (b) above
Answer : C

14. 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

15. When a particle in motion is acted upon by a force in a direction perpendicular to the direction of motion, the path followed by the particle will be
A. a straight line
B. an ellipse
C. a circle
D. a parabola
Answer : D

16. Two tumblers stuck together can be separated by
A. pouring ice cold water into the inner tumbler
B. pouring ice cold water on the outer tumbler
C. pouring hot water into the inner tumbler
D. dipping both the tumblers in hot water
Answer : A

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

18. The leader of the team who succeeded in constructing the first nuclear reactor (an atomic pile) in the world was
A. Albert Einstein
B. Enrico Fermi
C. HJ Bhabha
D. Sir Isaac Newton
Answer : B

19. A hydrogen bomb is based on
A. nuclear fusion
B. nuclear fission
C. Both (a) and (b) above
D. Neither (a) nor (b)
Answer : A

20. 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

21. The brightest planet in the Solar System is
A. Jupiter
B. Mercury
C. Venus
D. Sirius
Answer : C

22. Which of the following apparatus is used in the electrolysis of water?
A. Voltmeter
B. Voltameter
C. Ammeter
D. Potentiometer
Answer : B

23. In a refrigerator cooling is produced by
A. the ice that deposits on the freezer
B. the evaporation of a volatile liquid
C. None of the above
D. Both (a) and (b)
Answer : B

24. Why is nuclear fusion also known as thermonuclear reaction?
A. Fusion converts nuclear energy into heat
B. Fusion demands conditions of extremely high temperature to produce it
C. Fusion produces large amount of heat
D. Fusion reactions takes place in the sun
Answer : B

25. If a band is played on the moon the sound will
A. reverberate
B. be heard by us faintly
C. be heard upto 10 km from it
D. not be heard at any distance at all from it
Answer : D

26. At temperature near OK, (zero kelvin) metals such as lead and tin become
A. insulators
B. semiconductors
C. superconductors
D. condenser
Answer : C

27. Dioptre is the unit of power of
A. convex mirrors
B. concave mirrors
C. concave lenses
D. lenses irrespective of types
Answer : D

28. In the case of bodies falling under gravity which of the following remains constant at a given place?
A. kinetic energy
B. potential energy
C. acceleration
D. All the above
Answer : C

29. When light passes from air to glass, its velocity in glass
A. increases
B. decreases
C. remains unchanged
D. first decreases then increases
Answer : B

30. The period of oscillation of a simple pendulum depends upon
A. the mass of its bob
B. the material of the bob
C. the amplitude of vibration
D. acceleration due to the gravity at the site of experiment
Answer : D

31. 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

32. You want a supply of a small but constant current. Which of the following cells will you prefer?
A. Daniell cell
B. Leclanche cell
C. Dry cell
D. All the above
Answer : A

33. It is easier to climb down a staircase than climb up because in climbing down
A. work is done against gravity
B. the steepness of the staircase isn't felt
C. gravity assists
D. there is no friction between the legs and steps
Answer : C

34. Rays from the headlight of a motor car are rendered parallel by suitably using
A. a convex mirror behind it
B. a concave lens behind it
C. a concave mirror in front of it
D. a concave mirror behind it
Answer : D

35. A lactometer is used to
A. find out the specific gravity of liquids
B. measure the volumes of liquids
C. test the purity of milk
D. determine the strength of acid in car batteries
Answer : C

36. Solar radiation is preferred to other sources of energy because
A. it is practically inexhaustible
B. it is the cheapest form of energy
C. it does not cause pollution
D. All of the above
Answer : D

37. Separating particles from a suspension is effected by
A. centrifugal force
B. frictional force
C. gravitational force
D. distillation
Answer : A

38. A simple mercury barometer is found in a slightly slanting position. The atmospheric pressure
A. is found by measuring the slanting height of the mercury column
B. is given by the vertical height
C. cannot be measured with it
D. can be measured by both the methods described above
Answer : B

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

40. One finds it more difficult to walk on ice than on a concrete road because
A. there is more friction on ice than on concrete surface
B. ice is soft and spongy while concrete is hard
C. the friction between ice and the feet is less than that between the concrete and the feet
D. None of them
Answer : C

41. The speed of light is minimum while passing through
A. air
B. glass
C. vacuum
D. water
Answer : B

42. In a concert hall reverberation is controlled by
A. reduction of seating capacity in the hall
B. increase of sound intensity in the hall
C. lining the walls, with leather panels put on over a layer of sound absorbent glass fibre
D. by opening the doors and windows of concert hall
Answer : C

43. Mercury is used in a barometer because
A. its density being very high 13.6 g/cm3 the height of mercury column is conveniently small
B. at the ordinary temperature its vapour pressure is small
C. it is opaque and does not wet glass
D. All the above
Answer : D

44. When a bottle of perfume is opened in one corner of a room the smell spreads soon throughout the room. This is an example of
A. surface tension
B. capillarity
C. viscosity
D. diffusion
Answer : D

45. In a microphone
A. sound energy is converted into electrical energy
B. electrical energy is converted into sound energy
C. sound energy is converted into mechanical energy
D. mechanical energy is converted into sound energy
Answer : A

46. Alternating Current (AC) is more advantageous than direct current because
A. it can be transmitted easily and efficiently
B. Alternating Current (AC) loses the least amount of energy when transmitted at high voltages
C. Alternating Current (AC) voltage can be easily increased or decreased
D. all the above
Answer : D

47. Alpha particles are
A. electromagnetic radiations
B. helium nuclei
C. negatively charged particles
D. neutral particles
Answer : B

48. 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

49. A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is
A. greater than the weight of the man
B. less than the weight of the man
C. same as the weight of the man
D. zero
Answer : A

50. Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water
A. increases to a great extent
B. increases slightly
C. decreases slightly
D. decreases rapidly
Answer : C