1000+ General Physics MCQ for RBI Grade B officer [Solved]

1. A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan
A. increases
B. decreases
C. remains the same
D. first increases and then decreases
Answer : C

2. The aneroid barometer uses
A. mercury
B. distilled water
C. alcohol
D. does not use any liquid
Answer : D

3. The method used to separate aluminium from a alumina is
A. electroplating
B. electrotyping
C. electrolysis
D. distillation
Answer : C

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

5. The unit of power in SI is
A. Joule
B. Newton
C. Joule/Sec
D. Erg/Sec
Answer : C

6. The star nearest to the sun is
A. Proxima Centauri
B. Sirius
C. Aldebaran
D. Vega
Answer : A

7. Credit for starting Space Science Research in India goes to
A. HJ Bhabha
B. SS Bhatnagar
C. V Sarabhai
D. CV Raman
Answer : C

8. The filament lamp is an example for
A. fluorescence
B. incandescence
C. both (a) and (b)
D. None of these
Answer : B

9. The speed of sound in a medium depends upon the properties of the medium such as
A. its density
B. its temperature
C. its elasticity
D. All the above
Answer : D

10. Lightning conductors are made of
A. iron
B. chromium
C. copper
D. steel
Answer : C

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. In a longitudinal wave, the direction of propagation of the wave is
A. the same as the direction of the vibrations of the vibrating body
B. at right angles to the direction of the vibrations of the vibrating body
C. Both (a) and (b) above
D. None of the above
Answer : A

13. 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

14. Nuclear fission process means
A. absorption of a neutron by a nucleus
B. breakup of the nucleus of a heavy atom into two nearly equal halves emitting two or three neutrons and releasing large amounts of nuclear energy in the process
C. the scattering of neutrons
D. formation of heavier nucleus
Answer : B

15. Velocity of sound in high altitudes is low because at such a height
A. the temperature is low
B. there is no air
C. the pressure is low
D. All the above
Answer : A

16. 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

17. 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

18. The sun continuously produces an enormous amount of energy. This la due to
A. nuclear fission
B. nuclear fusion
C. chemical combustion
D. boiling
Answer : B

19. Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.
A. rough white
B. rough black
C. shining white
D. shining black
Answer : B

20. The device for tracking and locating the position of a moving object in space is called
A. Space ship
B. Lunar module
C. Radar
D. Rocket
Answer : C

21. 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

22. 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

23. 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

24. Credit for starting Space Science Research in India goes to
A. HJ Bhabha
B. SS Bhatnagar
C. V Sarabhai
D. CV Raman
Answer : C

25. Bats flying in the dark avoid obstacles because
A. they can see very dearly only in darkness
B. they produce ultrasonic waves which guide them
C. their eyes are sensitive to darkness
D. their eye holes expand in darkness
Answer : B

26. We always see only one side of the moon because
A. the sun comes in between the earth and moon
B. the moon is stationary
C. the time taken by the moon to rotate on its axis is the same as the time taken by it to revolve round the earth
D. moon revolves round the sun
Answer : C

27. Increase in pressure
A. has no effect on the boiling point of a liquid
B. raises the boiling point of a liquid
C. lowers the boiling point of a liquid
D. increases the volume of a liquid
Answer : B

28. 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

29. The Space Application Centre for training in Satellite Communication Technology is located at
A. Bangalore
B. Mumbai
C. Ahmedabad
D. New Delhi
Answer : C

30. The world's first artificial satellite Sputnik I was launched by Russia in
A. 1985
B. 1957
C. 1959
D. 1960
Answer : B

31. Which of the following is known as freon?
A. Liquid ammonia
B. Carbon tetrafluoride
C. Dichloro-difluoro-methane
D. Sulphur dioxide
Answer : C

32. A body has fallen from a height. Just before touching the pound it has
A. lost all its potential energy and gained an equivalent amount of kinetic energy
B. gained potential energy and lost kinetic energy
C. gained kinetic energy as well as potential energy
D. lost kinetic energy as well as potential energy
Answer : A

33. 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

34. X-rays are used
A. in hospital in the treatment of malignant growth
B. to reveal hidden flaws in metal castings and welded joints
C. to detect alterations made in works of art
D. All the above
Answer : D

35. In a dynamo
A. mechanical energy is converted to light energy
B. mechanical energy is converted to heat energy
C. mechanical energy is converted to electrical energy
D. electrical energy is converted to mechanical energy
Answer : C

36. The frequency of an ultrasonic wave is
A. the same as that of an audible sound
B. above the audible range
C. below the audible range
D. None of the above
Answer : B

37. X-rays were discovered by
A. Wilhelm Roentgen
B. WO Coolidge
C. Henry Cavendish
D. William Watson
Answer : A

38. The coil of an electric heater is made of
A. Platinum
B. Tungsten
C. Nichrome
D. Copper
Answer : C

39. A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because
A. the floor and carpet are at different temperatures
B. the stone conveys the heat away from the feet more rapidly than the carpet
C. the carpet is a better conductor of heat than the stone
D. the human body maintains a constant temperature
Answer : B

40. It is more difficult to walk on ice than on a concrete road because
A. there is very little friction between the ice and feet pressing it
B. ice is soft when compared to concrete
C. there is more friction between the ice and feet
D. None of the above
Answer : A

41. 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

42. 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

43. 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

44. The source of electric energy in an artificial satellite is
A. mininuclear reactor
B. a dynamo
C. a thermopile
D. solar cells
Answer : D

45. Frictional force acts in
A. the same direction as the motion
B. the opposite direction of the motion
C. all the directions
D. upward direction
Answer : B

46. The speed of sound in air at 0° C is approximately
A. 4 x 10 8 m/s
B. 1500 m/s
C. 330 m/s
D. 500 m/s
Answer : C

47. The planet that spins Caster than any other planet is
A. Saturn
B. Jupiter
C. Earth
D. Mercury
Answer : B

48. 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

49. 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

50. 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