general science

Physics MCQ Questions and Answers Page - 6

1.

On a cold day when the room temperature is 150C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 150C, because

Answer/ Hint      

Answer : C

Explanation :

2.

Quality of a musical note depends on

Answer/ Hint      

Answer : C

Explanation :

3.

The group of solar cells joined together in a definite pattern is called a

Answer/ Hint      

Answer : D

Explanation :

4.

Vegetables are cooked in lesser time by adding a pinch of salt while cooking because

Answer/ Hint      

Answer : A

Explanation :

5.

A hinged door is an example of :

Answer/ Hint      

Answer : B

Explanation :

6.

A pressure cooker reduces cooking time because :

Answer/ Hint      

Answer : B

Explanation :

7.

Slow and uniform cooling of hot iron in its metallurgy is known as : 

Answer/ Hint      

Answer : D

Explanation :

8.

Why the clear nights are cooler than the cloudy nights ?

Answer/ Hint      

Answer : C

Explanation :

9.

A flying jet possesses  ________ .

Answer/ Hint      

Answer : D

Explanation :

10.

Direction of heat flow depends on  ________ .

Answer/ Hint      

Answer : D

Explanation :

11.

What is the distance between a crest and a consecutive through in a transverse wave ?

Answer/ Hint      

Answer : C

Explanation :

12.

Who gave the ‘Law of Gravitation’ ?

Answer/ Hint      

Answer : D

Explanation :

13.

The first law of thermodynamics is related to conservation of which one of the following ?

Answer/ Hint      

Answer : A

Explanation :

14.

Which of the following cloth will readily catch fire ?

Answer/ Hint      

Answer : A

Explanation :

15.

What is the minimum distance (in metres) required to hear an echo ?

Answer/ Hint      

Answer : C

Explanation :

16.

Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth ?

Answer/ Hint      

Answer : A

Explanation :

17.

The phenomena of raising the outer edge of the curved roads above the inner edge to provide necessary centripetal force to the vehicles to take a safe turn is called  ________ .

Answer/ Hint      

Answer : A

Explanation :

18.

Gravitational force is maximum at which of the following place ?

Answer/ Hint      

Answer : D

Explanation :

19.

At that temperature (in Fahrenheit) pure water freezes ?

Answer/ Hint      

Answer : A

Explanation :

20.

Which among the following determines the pitch of a sound ?

Answer/ Hint      

Answer : B

Explanation :

21.

Supercooling is cooling of liquid  __________ .

Answer/ Hint      

Answer : B

Explanation :

22.

If the force applied on the object is in the direction opposite to the direction of motion, the speed of the object  ________ .

Answer/ Hint      

Answer : C

Explanation :

23.

If the force applied on the object is in the direction of its motion, the speed of the object  ________ .

Answer/ Hint      

Answer : A

Explanation :

24.

Which type of sound waves can propagate in solids ?

Answer/ Hint      

Answer : C

Explanation :

25.

Loudness of sound depends upon which of the following  ?

Answer/ Hint      

Answer : C

Explanation :

26.

When a freely falling object eventually stops on reaching the ground  _________ .

Answer/ Hint      

Answer : C

Explanation :

27.

How much calories are there in a Joule ?

Answer/ Hint      

Answer : A

Explanation :

28.

If the momentum of a body is doubled, the kinetic energy is

Answer/ Hint      

Answer : D

Explanation :

29.

The amount of heat that is produced in a wire when electric current passes through does not depends on  __________ .

Answer/ Hint      

Answer : D

Explanation :

30.

A wound watch spring has  ___________  energy.

Answer/ Hint      

Answer : C

Explanation :

31.

When an object is transferred from Earth to Moon  _________ .

Answer/ Hint      

Answer : D

Explanation :

32.

When a ball is thrown upwards than at what position its potential energy will be maximum ?

Answer/ Hint      

Answer : D

Explanation :

33.

Rough surface have  __________ .

Answer/ Hint      

Answer : A

Explanation :

34.

The direction of heat flow between two body depends on which of the following ?

Answer/ Hint      

Answer : C

Explanation :

35.

Noise is measured in which unit ?

Answer/ Hint      

Answer : D

Explanation :

36.

A wooden spoon is dipped in a cup of ice cream. Its other end will  __________ .

Answer/ Hint      

Answer : D

Explanation :

37.

What is the numerical value of temperature at which Fahrenheit and Celsius scales are equal ?

Answer/ Hint      

Answer : B

Explanation :

38.

Within an environment, what is horizontal heat transfer called as ?

Answer/ Hint      

Answer : D

Explanation :

39.

Time period of a pendulum will  _________  at the Moon to that of on the Earth ?

Answer/ Hint      

Answer : C

Explanation :

40.

To hear a distinct echo, the time interval between the original sound and reflected sound must be at least  ________ .

Answer/ Hint      

Answer : A

Explanation :

41.

Dioptre is unit of  _________ .

Answer/ Hint      

Answer : A

Explanation :

42.

If the diameter of a capillary is doubled, then the rise of water in it will be

Answer/ Hint      

Answer : B

Explanation :

43.

Which of the following statements is true when we see ‘rainbow’  ?

Answer/ Hint      

Answer : B

Explanation :

44.

The splitting of different colours of light in a prism is  :

Answer/ Hint      

Answer : B

Explanation :

45.

Optic fibres are used in  :

Answer/ Hint      

Answer : D

Explanation :

46.

Two waves, each of amplitude 1.5 mm  and frequency  10 Hz, are travelling in opposite direction with a speed of 20  mm/s. the distance in mm between adjacent nodes is  :

Answer/ Hint      

Answer : A

Explanation :

47.

Holography is a technique of

Answer/ Hint      

Answer : D

Explanation :

48.

The velocity of heat radiation in vacuum is

Answer/ Hint      

Answer : A

Explanation :

49.

Ultra violet radiations of the sun do not reach the earth because, earth’s atmosphere is surrounded by

Answer/ Hint      

Answer : D

Explanation :

50.

Gamma rays can cause

Answer/ Hint      

Answer : A

Explanation :

51.

What is colour of light related to  ?

Answer/ Hint      

Answer : A

Explanation :

52.

What is viewed through an electron microscope  ?

Answer/ Hint      

Answer : B

Explanation :

53.

Which combination of colour is the most convenient during day and night time  ?

Answer/ Hint      

Answer : D

Explanation :

54.

Electron microscope was invented by

Answer/ Hint      

Answer : A

Explanation :

55.

Which one of the following is used for sun glasses  ?

Answer/ Hint      

Answer : C

Explanation :

56.

The speed of light with the rise in the temperature of the medium  :

Answer/ Hint      

Answer : C

Explanation :

57.

What is the wavelength of visible spectrum  ?

Answer/ Hint      

Answer : B

Explanation :

58.

Who measured the velocity of light first  ?

Answer/ Hint      

Answer : C

Explanation :

59.

The sky appears blue because of

Answer/ Hint      

Answer : B

Explanation :

60.

An electron microscope gives higher magnification than an optical microscope, because  :

Answer/ Hint      

Answer : D

Explanation :

61.

Lamberts law is related to

Answer/ Hint      

Answer : D

Explanation :

62.

Danger signals are generally red as red light

Answer/ Hint      

Answer : B

Explanation :

63.

A simple microscope consists of  :

Answer/ Hint      

Answer : A

Explanation :

64.

‘Short-sight’ in human eye can be corrected by using proper

Answer/ Hint      

Answer : B

Explanation :

65.

What is the reason for twinkling of stars  ?

Answer/ Hint      

Answer : D

Explanation :

66.

Which of the following is used to split while light into different colours  ?

Answer/ Hint      

Answer : D

Explanation :

67.

Which one of the following instruments is used to study dispersion of light  ?

Answer/ Hint      

Answer : C

Explanation :

68.

Fibre optics work on the principle of

Answer/ Hint      

Answer : C

Explanation :

69.

Which one of the following lenses should be used to correct the defect of astigmatism  ?

Answer/ Hint      

Answer : A

Explanation :

70.

In a Laser (say neon laser) all the atoms emit the light waves of

Answer/ Hint      

Answer : D

Explanation :

71.

Which colour is the complementary colour of yellow  ?

Answer/ Hint      

Answer : A

Explanation :

72.

A pond of water appears less deep due to

Answer/ Hint      

Answer : C

Explanation :

73.

The type of mirrors used in the headlamp of cars is

Answer/ Hint      

Answer : A

Explanation :

74.

When a person walking in bright sunlight enters a dark room, he is not able to see clearly for a little while because

Answer/ Hint      

Answer : D

Explanation :

75.

Spectacles used for viewing  3D  films have

Answer/ Hint      

Answer : D

Explanation :

76.

Which one of the following wave-lengths of light is most effective in photosynthesis ?

Answer/ Hint      

Answer : A

Explanation :

77.

A colour-blind person cannot

Answer/ Hint      

Answer : C

Explanation :

78.

A mirage occurs because of

Answer/ Hint      

Answer : B

Explanation :

79.

Bolometer is used to measure

Answer/ Hint      

Answer : B

Explanation :

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