general science

Physics MCQ Questions and Answers Page - 2

1.

A micron is equal to

Answer/ Hint      

Answer : C

Explanation :

2.

Amount of water vapour (gaseous) in a given volume of air (cable metre) is known as :

Answer/ Hint      

Answer : C

Explanation :

3.

When a running car stops suddenly, the passengers tends to lean forward because of :

Answer/ Hint      

Answer : C

Explanation :

4.

When a strong beam of light is passed through a colloidal solution, the light will

Answer/ Hint      

Answer : A

Explanation :

5.

When a body fails from an aeroplane, there is increase in its

Answer/ Hint      

Answer : C

Explanation :

6.

The motion of a body that repeats itself after a regular interval of time is

Answer/ Hint      

Answer : A

Explanation :

7.

Specific gravity is defined as the ratio of

Answer/ Hint      

Answer : A

Explanation :

8.

One bar is equal to

Answer/ Hint      

Answer : C

Explanation :

9.

A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that

Answer/ Hint      

Answer : A

Explanation :

10.

Kepler’s law of planetary motion states that the square of the time period is proportional to the

Answer/ Hint      

Answer : C

Explanation :

11.

The dimension MLT-2 corresponds to

Answer/ Hint      

Answer : A

Explanation :

12.

The density of water bis 1 g/cc. This is strictly valid at

Answer/ Hint      

Answer : B

Explanation :

13.

The speed of light in air is

Answer/ Hint      

Answer : A

Explanation :

14.

A man standing on a edge of a cliff throws a stone vertically upwards with a certain speed. He then throws another stone downwards with the the same speed. Find the ratio of the speeds of the two s

Answer/ Hint      

Answer : A

Explanation :

15.

The mass of a body measured by a physical balance in a lift at rest is found to be m. If the lift is going up with an acceleration a, its mass will be measured as

Answer/ Hint      

Answer : C

Explanation :

16.

The dimensional formula for universal gravitational constant is

Answer/ Hint      

Answer : D

Explanation :

17.

Rocket works on the principle of

Answer/ Hint      

Answer : A

Explanation :

18.

The weight of a body acts through the centre of

Answer/ Hint      

Answer : A

Explanation :

19.

A wheel-barrow is an example of

Answer/ Hint      

Answer : D

Explanation :

20.

The motion of a body around a circular path is an example of

Answer/ Hint      

Answer : A

Explanation :

21.

Flywheel is an important part of a steam engine because it :

Answer/ Hint      

Answer : B

Explanation :

22.

Relative humidity is expressed as

Answer/ Hint      

Answer : C

Explanation :

23.

The motion of the wheels of a bullock-cart while moving on the road is an example of

Answer/ Hint      

Answer : C

Explanation :

24.

If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by

Answer/ Hint      

Answer : B

Explanation :

25.

Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be

Answer/ Hint      

Answer : D

Explanation :

26.

A system exhibiting S.H.M. must possess

Answer/ Hint      

Answer : A

Explanation :

27.

The moment of inertia of a body does not depend upon its

Answer/ Hint      

Answer : B

Explanation :

28.

To open a door easily, the handle should be fixed

Answer/ Hint      

Answer : D

Explanation :

29.

A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration of the particle is

Answer/ Hint      

Answer : D

Explanation :

30.

Period of oscillation of 3 cm microwaves in seconds is

Answer/ Hint      

Answer : B

Explanation :

31.

An object covers distance which is directly proportional to the square of the time. Its acceleration is

Answer/ Hint      

Answer : D

Explanation :

32.

If the horizontal range of a projectile is four times its maximum height, the angle of projection is

Answer : B

Explanation :

33.

Which of the following have the same unit ?

Answer/ Hint      

Answer : C

Explanation :

34.

In a particular system, the units of length, mass and time are chosen to be 10 cm, 10 g and 0.1 s respectively. the unit of force in this system will be equivalent to

Answer/ Hint      

Answer : A

Explanation :

35.

Distances of stars are measured in

Answer/ Hint      

Answer : D

Explanation :

36.

A man standing at the top of a tower has two spheres A and B. he drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?

Answer/ Hint      

Answer : A

Explanation :

37.

Water has maximum density at

Answer/ Hint      

Answer : C

Explanation :

38.

If a body moves with a constant speed in a circle

Answer/ Hint      

Answer : D

Explanation :

39.

Which of the following is a scalar quantity ?

Answer/ Hint      

Answer : D

Explanation :

40.

Which of the following is not a vector quantity ?

Answer/ Hint      

Answer : A

Explanation :

41.

An object with a constant speed

Answer/ Hint      

Answer : A

Explanation :

42.

A man in a train moving with a constant velocity drops a ball on the platform. The path of the ball as seen by an observer standing on the platform is

Answer/ Hint      

Answer : C

Explanation :

43.

A person can jump higher on the moon’s surface than on the earth because :

Answer/ Hint      

Answer : B

Explanation :

44.

The apparent weight of a man in a lift is less the real weight when :

Answer/ Hint      

Answer : D

Explanation :

45.

Which one of the following is a non-dimensional quantity ?

Answer/ Hint      

Answer : B

Explanation :

46.

When water freezes its density

Answer/ Hint      

Answer : A

Explanation :

47.

A bullet of mass ‘m’ and velocity ‘’ is fired into a large block of wood of mass ‘M’. The final velocity of the system is

Answer : B

Explanation :

48.

The amount of matter in a ball of steel is its :

Answer/ Hint      

Answer : B

Explanation :

49.

If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound ?

Answer/ Hint      

Answer : D

Explanation :

50.

‘Parsec’ is the unit measurement of

Answer/ Hint      

Answer : B

Explanation :

51.

The SI unit of luminous emittance is :

Answer/ Hint      

Answer : A

Explanation :

52.

The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be :

Answer/ Hint      

Answer : A

Explanation :

53.

The weight of a body at the centre of earth is :

Answer/ Hint      

Answer : B

Explanation :

54.

Which of the following is an example of simple harmonic motion ?

Answer/ Hint      

Answer : B

Explanation :

55.

Which of the following is the unit of Astronomical Distance ?

Answer/ Hint      

Answer : D

Explanation :

56.

The washing machine works on the principle of

Answer/ Hint      

Answer : D

Explanation :

57.

00  K is equivalent to

Answer/ Hint      

Answer : B

Explanation :

58.

The absolute zero is a temperature at which  __________

Answer/ Hint      

Answer : A

Explanation :

59.

A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of  __________ .

Answer/ Hint      

Answer : D

Explanation :

60.

The temperature of a liquid is 320 F. What is its temperature in Celsius scale ?

Answer/ Hint      

Answer : B

Explanation :

61.

The point where total mass of a body is supposed to be concentrated is known as

Answer/ Hint      

Answer : B

Explanation :

62.

If there were no gravity, which of the following will not be there for a fluid ?

Answer/ Hint      

Answer : D

Explanation :

63.

If ice floating on water in a vessel melts, the water level in the vessel  __________ .

Answer/ Hint      

Answer : D

Explanation :

64.

Why is weightlessness experienced while orbiting the earth in

Answer/ Hint      

Answer : D

Explanation :

65.

Two vectors are said to be equal if

Answer/ Hint      

Answer : C

Explanation :

66.

Why does a cannon recoil after firing ?

Answer/ Hint      

Answer : C

Explanation :

67.

A bomb explodes on the moon. You will hear its sound on earth after  ____________

Answer/ Hint      

Answer : D

Explanation :

68.

During the motion of projectile fired from the earth surface, __________

Answer/ Hint      

Answer : D

Explanation :

69.

Absolute Zero is defined as

Answer/ Hint      

Answer : A

Explanation :

70.

A body moving in a circular path with a constant speed has a

Answer/ Hint      

Answer : C

Explanation :

71.

One nanometre is equal to  __________ metres.

Answer/ Hint      

Answer : C

Explanation :

72.

What is the unit of relative density ?

Answer/ Hint      

Answer : D

Explanation :

73.

Acceleration is

Answer/ Hint      

Answer : A

Explanation :

74.

What is the Earth’s escape velocity ?

Answer/ Hint      

Answer : C

Explanation :

75.

An object is in static equilibrium when it is  _________

Answer/ Hint      

Answer : A

Explanation :

76.

When net torque is zero,  _________  will be constant

Answer/ Hint      

Answer : B

Explanation :

77.

Newton’s first law is also known as  _________ .

Answer/ Hint      

Answer : C

Explanation :

78.

Acceleration due to energy on a planet decreases with  _________ .

Answer/ Hint      

Answer : D

Explanation :

79.

Why boiling point of water decreases at high altitudes ?

Answer/ Hint      

Answer : B

Explanation :

Low atmospheric pressure

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