general science

Physics MCQ Questions and Answers Page - 7

1.

A soap bubble shows colours when illuminated with white light. This is due to

Answer/ Hint      

Answer : C

Explanation :

2.

The instrument used to see the distant objects on the Earth is

Answer/ Hint      

Answer : A

Explanation :

3.

Global warming is expected to result in

Answer/ Hint      

Answer : D

Explanation :

4.

A concave lens always forms an image which is

Answer/ Hint      

Answer : B

Explanation :

5.

Optical fibres are based on the phenomenon of

Answer/ Hint      

Answer : D

Explanation :

6.

Lens is made up of

Answer/ Hint      

Answer : B

Explanation :

7.

One can distinguish  a telescope from a microscope by observing

Answer/ Hint      

Answer : D

Explanation :

8.

A new technology which provides the ability to create an artificial world and have people interact with it is called  :

Answer/ Hint      

Answer : B

Explanation :

9.

Which one of the following determines the sharpness of image in a camera  ?

Answer/ Hint      

Answer : A

Explanation :

10.

For a person having hypermetropia, the near point is

Answer/ Hint      

Answer : A

Explanation :

11.

Eclipses occur to which optical phenomena  ?

Answer/ Hint      

Answer : C

Explanation :

12.

Persistence of vision is the principle behind

Answer/ Hint      

Answer : C

Explanation :

13.

A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focussed in his eyes

Answer/ Hint      

Answer : B

Explanation :

14.

Myopia is the same as

Answer/ Hint      

Answer : A

Explanation :

15.

A microscope used in pathological laboratories forms

Answer/ Hint      

Answer : C

Explanation :

16.

The magnifying power of n astronomical telescope can be decreased by

Answer/ Hint      

Answer : B

Explanation :

17.

The owl can see most clearly in total darkness because

Answer/ Hint      

Answer : B

Explanation :

18.

Which colour of light shows maximum deviation when passed through a prism  ?

Answer/ Hint      

Answer : C

Explanation :

19.

Night photography and photography in mist and fog are possible using

Answer/ Hint      

Answer : B

Explanation :

20.

The blue colour of water in the sea is due to

Answer/ Hint      

Answer : A

Explanation :

21.

Rainbow is seen after rain because of hanging molecules of water which act as

Answer/ Hint      

Answer : B

Explanation :

22.

Which of the following is optical illusion  ?

Answer/ Hint      

Answer : D

Explanation :

23.

In sunlight a rose appears red. In green light, the same rose appears

Answer/ Hint      

Answer : B

Explanation :

24.

The sparkling of a diamond is due to

Answer/ Hint      

Answer : A

Explanation :

25.

It is dangerous to observe solar eclipse with naked eyes because

Answer/ Hint      

Answer : B

Explanation :

26.

These waves cannot be transmitted through vacuum

Answer/ Hint      

Answer : B

Explanation :

27.

Stars in the sky appear to twinkle due to

Answer/ Hint      

Answer : A

Explanation :

28.

Small bubbles are perfectly spherical because of

Answer/ Hint      

Answer : D

Explanation :

29.

The final image in a simple microscope is

Answer/ Hint      

Answer : C

Explanation :

30.

Two rods, one of copper and other of steel, experience the same up-thrust when placed in water. Thus, both have

Answer/ Hint      

Answer : A

Explanation :

31.

Hypermetropia or long-sight can be corrected by using  :

Answer/ Hint      

Answer : D

Explanation :

32.

In mirrors the back surface is coated with a thin layer of  :

Answer/ Hint      

Answer : B

Explanation :

33.

An optically plane surface reflects a beam of light

Answer/ Hint      

Answer : C

Explanation :

34.

A periscope work on the principle of

Answer/ Hint      

Answer : B

Explanation :

35.

A rear-view mirror for driving is

Answer/ Hint      

Answer : D

Explanation :

36.

Tear gas used by the police to disperse the mob contains

Answer/ Hint      

Answer : B

Explanation :

37.

The part of the eye having the larger refractive index is  :

Answer/ Hint      

Answer : C

Explanation :

38.

A man cannot see clearly beyond 10 metres. The disease he suffers from  :

Answer/ Hint      

Answer : B

Explanation :

39.

Light beam which is highly directional is called  :

Answer/ Hint      

Answer : D

Explanation :

40.

Energy in reflected light  :

Answer/ Hint      

Answer : B

Explanation :

41.

Which colour of light shows maximum deviation when passed through a prism  ?

Answer/ Hint      

Answer : C

Explanation :

42.

When a light wave is reflected from a mirror, there is a change in its

Answer/ Hint      

Answer : B

Explanation :

43.

Magnifying Glass is basically a

Answer/ Hint      

Answer : C

Explanation :

44.

The head mirror used by ENT doctors is

Answer/ Hint      

Answer : A

Explanation :

45.

Direct conversion solar energy with the use of a photo voltaic cell results in the production of

Answer/ Hint      

Answer : B

Explanation :

46.

White clothes are cooler than black ones because they

Answer/ Hint      

Answer : B

Explanation :

47.

The primary colours in photography are

Answer/ Hint      

Answer : A

Explanation :

48.

For a ray of light to suffer total internal reflection it has to pass from  :

Answer/ Hint      

Answer : A

Explanation :

49.

A black body can absorb radiation of  :

Answer/ Hint      

Answer : D

Explanation :

50.

Persons suffering from myopia are advised to use 

Answer/ Hint      

Answer : B

Explanation :

51.

Conversion of sound energy into electrical energy is done by

Answer/ Hint      

Answer : C

Explanation :

52.

Convex mirrors are used as a rear view mirror in motor cycles because

Answer/ Hint      

Answer : D

Explanation :

53.

A star appears twinkling in the sky because of

Answer/ Hint      

Answer : C

Explanation :

54.

A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers.

Answer/ Hint      

Answer : D

Explanation :

55.

Persistence of vision is the Principle behind  :

Answer/ Hint      

Answer : B

Explanation :

56.

Time of exposure required for taking photograph of an object depends upon the

Answer/ Hint      

Answer : A

Explanation :

57.

Which one of the following is responsible for the working of Newton’s colour disc experiment  ?

Answer/ Hint      

Answer : C

Explanation :

58.

What is a compound microscope  ?

Answer/ Hint      

Answer : B

Explanation :

59.

Sensitivity of the human eye is maximum in the

Answer/ Hint      

Answer : B

Explanation :

60.

Which of the following is  not  caused by atmospheric refraction of light  ?

Answer/ Hint      

Answer : C

Explanation :

61.

Dioptere is the unit of

Answer/ Hint      

Answer : A

Explanation :

62.

A white and smooth surface is

Answer/ Hint      

Answer : B

Explanation :

63.

An object which absorbs all colours and reflects none appears  :

Answer/ Hint      

Answer : D

Explanation :

64.

The splitting of white light into its components is due to  :

Answer/ Hint      

Answer : D

Explanation :

65.

The threshold frequency is the frequency below which  :

Answer/ Hint      

Answer : C

Explanation :

66.

Transition ions absorb light in  :

Answer/ Hint      

Answer : D

Explanation :

67.

A thin oil film on a water surface appears coloured because of

Answer/ Hint      

Answer : B

Explanation :

68.

Golden view of sea shell is due to

Answer/ Hint      

Answer : C

Explanation :

69.

Rainbow is formed due to

Answer/ Hint      

Answer : D

Explanation :

70.

An electron microscope gives higher magnifications than an optical microscope because  :

Answer/ Hint      

Answer : B

Explanation :

71.

The mercury and sodium street lamps light up because of  :

Answer/ Hint      

Answer : A

Explanation :

72.

Which of the following colour of light deviates least through the prism  ?

Answer/ Hint      

Answer : D

Explanation :

73.

Which one of the following is not a feature of Indifference Curve  ?

Answer/ Hint      

Answer : D

Explanation :

74.

Rainbows are produced when sunlight  :

Answer/ Hint      

Answer : B

Explanation :

75.

Which of these travels in glass with minimum velocity  ?

Answer/ Hint      

Answer : B

Explanation :

76.

The phenomenon which causes mirage is

Answer/ Hint      

Answer : D

Explanation :

77.

A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes  :

Answer/ Hint      

Answer : B

Explanation :

78.

Distant objects are visible as a little out of focus in this condition  :

Answer/ Hint      

Answer : D

Explanation :

79.

The redness in atmosphere at Sunrise and Sunset is due to  :

Answer/ Hint      

Answer : D

Explanation :

80.

Which one of the following reflects back more sunlight as compared to other three  ?

Answer/ Hint      

Answer : B

Explanation :

81.

The least distance of distinct vision is

Answer/ Hint      

Answer : B

Explanation :

82.

Purpose of an optical filter is to

Answer/ Hint      

Answer : D

Explanation :

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