General Physics MCQ Solved Paper for RBI Assistant

1. Which of the following is wrongly matched?
A. electric current - ampere
B. resistance - Ohm
C. electric power - volt
D. electric charge Coulomb
Answer : C

2. 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

3. Rain drops acquire spherical shape due to
A. viscosity
B. surface tension
C. friction
D. elasticity
Answer : B

4. Photo-electric cells convert
A. electrical energy into light energy
B. light energy into electrical energy
C. light energy into heat energy
D. electrical energy into heat energy
Answer : B

5. A piece of cork la embedded inside an ice block which floats in water. What will happen to the level of water when all ice melts?
A. It will go down
B. It will come up
C. It will remain at the same level
D. First it will go down and it will come up
Answer : C

6. The following are the atmospheric zones above the surface of the earth:
A) Troposphere
B) Ionosphere
C) Stratosphere
D) Exosphere
Select the correct sequence from the earth's surface on the basis of the codes given below:
A. ACBD
B. ABCD
C. CABD
D. BACD
Answer : A

7. A spherical mirror is
A. a reflecting elliptical portion
B. a reflecting spherical surface
C. a parabolic reflecting surface
D. a flat reflecting surface
Answer : B

8. Why is it cool near an open pond on a hot summer day?
A. Evaporation at the surface causes cooling
B. The heat obsorbed at the surface is passed on to the bottom
C. Because of impurity in the water
D. Because of convection currents set up inside water
Answer : A

9. Some persons are not able to see distant objects clearly because the image of the object is focused in front of the retina. This defect is known as
A. short sight
B. long sight
C. astigmatism
D. presbyopia
Answer : A

10. The mirage is a phenomenon
A. generally considered as a desert happening
B. caused by unequal heating of the several layers of the atmosphere above the desert
C. in which the refracted rays take a curved path resulting in total internal refection
D. All the above
Answer : D

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

12. Water kept in an earthen pot is less cool on rainy days than in summer because during the rainy days
A. the pores in the pot are closed
B. rain water stops oozing out from the pores
C. the water that oozes out does not evaporate quickly because of the large percentage of moisture in the air
D. surface of the pot becomes damp
Answer : C

13. In the fuse of an electrical installation blows out
A. replace the fuse by a thin wire
B. replace the fuse by a thick copper wire
C. replace the fuse by a fuse wire of proper rating
D. replace the fuse by nichrome wire
Answer : C

14. Commonly used safety fuse wire is made of
A. Tin
B. Lead
C. Nickel
D. An alloy of tin and lead
Answer : D

15. An integrated circuit la more advantageous than a conventional circuit because
A. they make the electric equipment more reliable and easier for servicing
B. a faulty part of a conventional circuit may be difficult to locate and repair
C. if a part of the integrated circuit fails the entire circuit is simply replaced
D. All the above
Answer : D

16. 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

17. Resistance is measured in
A. Volts
B. Amperes
C. ohms
D. coulombs
Answer : C

18. Sound waves in air are
A. transverse
B. longitudinal
C. transverse and longitudinal
D. neither transverse nor longitudinal
Answer : B

19. 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

20. 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

21. A solar eclipse occurs when the earth, the sun and the moon are in a straight line, and
A. when the moon passes between the sun and the earth
B. when the sun comes between the earth and the moon
C. when the earth comes between the sun and the moon
D. on a full moon day
Answer : A

22. The neutron, one of the constituent particles of which the nuclei of atoms are composed was discovered by
A. Irene Curie
B. W Bothe and H Becker
C. James Chadwick
D. Jean Joliot
Answer : C

23. 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

24. If a body weight 12N on the surface of the earth, how much will it weigh on the surface of the moon where acceleration due to gravity is only one-sixth of that on earth's surface?
A. 12N
B. 2N
C. 10N
D. 6N
Answer : B

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

26. No current will flow between two charged bodies if they have the same
A. resistance
B. charge
C. potential
D. charge/potential ratio
Answer : C

27. 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

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

29. Which of the following revolves round the nucleus in an atom?
A. protons
B. electrons
C. neutrons
D. positrons
Answer : B

30. A convex mirror always produces
A. an erect, virtual image of diminished size
B. an erect, real image of diminished size
C. an erect, real image of double size
D. a virtual image of double size
Answer : A

31. The Indian Satellite System used for domestic communications, television and meteorology is known as
A. INSAT
B. Bhaskara
C. Aryabhatta
D. All the above
Answer : A

32. The enormous energy released in nuclear and thermonuclear reactions is due to conversion of
A. chemical energy into heat energy
B. mechanical energy into heat energy
C. protons into neutrons
D. mass into energy according to Einstein's equation
Answer : D

33. A lightning conductor installed in a building
A. does not allow the lightning to fall on the building at all
B. drives away the charged clouds
C. forces the lightning to fall on other buildings near that building
D. conducts the electric charges to the ground when lightning strikes the building
Answer : D

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

35. The focal length or lens or the eye is under the control or the
A. iris
B. pupil
C. ciliary body
D. cornea
Answer : C

36. Which of the following wires of same dimensions offers least resistance to the ,flow of current?
A. copper
B. aluminium
C. silver
D. nichrome
Answer : C

37. The radius of curvature of a spherical mirror is
A. equal to half its focal length
B. equal to its focal length
C. twice its focal length
D. not related to its focal length
Answer : C

38. 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

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

40. 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

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

42. Raindrops assume a spherical shape because or
A. adhesion
B. surface tension
C. gravitational force
D. atmospheric pressure from all sides
Answer : B

43. 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

44. The maximum displacement of the particle in a mechanical wave motion is known as
A. amplitude
B. vibration
C. frequency
D. phase
Answer : A

45. The Indian Space Research Organisation (ISRO) is located at
A. Thumba
B. Bangalore
C. Ahmedabad
D. New Delhi
Answer : B

46. The velocity of sound in air
A. increases as the square root of the absolute temperature
B. decreases with temperature
C. is independent of temperature
D. None of these
Answer : A

47. Match the following:

A. Anemometer	1. Measurement of power
B. Tachometer	2. Wind speed
C. Dynamometer	3. Revolutions per minute
D. Barometer	4. Atmospheric pressure
*	5. Current from a dynamo

A. A-1 B-3 C-5 D-4
B. A-2 B-1 C-3 D-4
C. A-2 B-3 C-1 D-4
D. A-1 B-3 C-5 D-2
Answer : C

48. When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of light ray diminishes alter a few reflections. This is because of
A. poor reflection from the mirrors
B. scattering of light from the mirrors
C. absorption of some light by the mirrors
D. absorption of light by the atmosphere
Answer : C

49. 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

50. 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