1000+ General Physics MCQ for SSC CPO [Solved]

1. The inside of both the walls of a thermos flask is silvered i.e., on the vacuum side in order to reduce heat loss by
A. convection
B. radiation
C. conduction
D. All the three
Answer : B

2. 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

3. 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

4. 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

5. Heat is transmitted from one end of a metal rod to its other end by the method of
A. conduction
B. convection
C. radiation
D. sublimation
Answer : A

6. Acoustics is a property or
A. Physics
B. Chemistry
C. Biology
D. Economic
Answer : A

7. A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance
A. will increase
B. will decrease
C. does not change
D. varies with the increase of depth of the immersion of the iron piece
Answer : A

8. Red Light is used as a dancer signal because
A. it is pleasing to the eye
B. it has a traditional colour
C. it is easily distinguishable
D. it is most sensitive to the human eye
Answer : D

9. 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

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

11. A piece of cork is 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

12. SONAR (Sound Navigation Ranging) is
A. used by warships and military aircraft to locate enemy submarines
B. used by ships to determine the depth of water beneath them
C. a detective device that uses sound to locate under - water objects
D. All the above
Answer : D

13. 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

14. 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

15. 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

16. Like magnetic poles
A. attract each other
B. repel each other
C. neither attract nor repel
D. attract or repel depending upon the conditions
Answer : B

17. 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

18. A projectile is fired at an angle with the horizontal with a small velocity. Its horizontal range will be maximum when the angle with the horizontal is
A. 0°
B. 30°
C. 45°
D. 60°
Answer : C

19. Pieces of camphor placed on water move about rapidly. This is because of
A. diffusion
B. viscosity
C. surface tension
D. capillarity
Answer : C

20. It is difficult to bon potatoes at the top or a mountain because
A. the water available is hard
B. it is colder than at sea level
C. the potatoes become hard
D. the boiling point of water is lower at that height on account of low atmospheric pressure
Answer : D

21. 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

22. Out of the following which is an insulator?
A. Silver
B. Copper
C. Nichrome
D. Dry wood
Answer : D

23. Fish and other aquatic creatures can live inside a deep frozen pond because
A. fish are cold-blooded animals
B. ice is a bad conductor of heat
C. there will always be water just beneath the ice level
D. they can adapt themselves to live in ice
Answer : C

24. When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is
A. the violet ray
B. the red ray
C. the green ray
D. the blue ray
Answer : B

25. 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

26. Which of the following is fissionable?
A. U-234
B. U-235
C. U-238
D. Both (b) and (c)
Answer : B

27. Atoms which have the same atomic number but different mass numbers are called
A. isobars
B. isomers
C. isotones
D. isotopes
Answer : D

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

29. Changing of one element into another element is known as
A. transmutation
B. fission
C. fusion
D. radioactivity
Answer : A

30. What la the minimum velocity required for a rocket to overcome earth's gravity and travel into space?
A. 18 km/sec
B. 11.2 km/ sec
C. 21 km/ sec
D. 35 km/ sec
Answer : B

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

32. 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

33. Changing of one element into another element is known as
A. transmutation
B. fission
C. fusion
D. radioactivity
Answer : A

34. 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

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

36. 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

37. 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

38. The image of an object formed on the retina of the eye is
A. virtual and upright
B. virtual and inverted
C. real and inverted
D. real and upright
Answer : C

39. Besides protons, the nucleus of an atom contains
A. electrons
B. neutrons
C. neutrons and electrons
D. electrons, neutrons and other particles
Answer : B

40. An ammeter has
A. a high resistance
B. a very low resistance
C. no resistance at all
D. resistance of 400 � w
Answer : B

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

42. Mercury does not stick to glass because
A. cohesive forces between the mercury molecules are greater than adhesive forces between mercury and glass molecules
B. the adhesive forces between mercury and glass molecules are greater than the cohesive forces
C. both the cohesive and adhesive forces are equal
D. None of the above
Answer : A

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

44. 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 hen transmitted at high voltages
C. Alternating Current (AC) voltage can be easily increased or decreased
D. all the above
Answer : D

45. Which mirror is used as a rear view mirror in Vehicles?
A. Parabolic
B. Convex
C. Concave
D. Plain
Answer : B

46. The temperature of a large bucket-full of hot water (a few degrees below boiling point) is lower than a beaker full of boiling water. But
A. the hot water contains a much larger quantity of internal energy than the boiling water
B. the boiling water contains more quantity of internal energy than the warm water
C. both of them have got the same amount of internal energy.
D. nothing can be said definitely with the data given
Answer : A

47. The electrical domestic tube light gives white fiourescent light because of
A. collision between molecules of filled gas under electric current
B. heavy current
C. vacuum inside the tube
D. falling of ultra violet rays on the white inner coating of the tube
Answer : D

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

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

50. Which is the densest planet of the solar system?
A. Sun
B. Jupiter
C. Mercury
D. Earth
Answer : D