1500 Important Physics MCQ Question and Answer PDF

1.The dimension of which of the following is the same as that of impulse?

  • AVolume
  • BMomentum
  • CTorque
  • DChange in the rate of momentum
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Correct Answer : (B)

Momentum

Explanation:

2.Which among the following is the fundamental quantity?

  • AVolume
  • BTime
  • CVelocity
  • DForce
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Correct Answer : (B)

Time

Explanation:

3.What is the minimum escape velocity of rocket to be launched in to space?

  • A5 km/sec
  • B6 km/sec
  • C11 km/sec
  • D15 km/sec
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Correct Answer : (C)

11 km/sec

Explanation:

The minimum escape velocity of rocket to be launched in to space is 11 km/sec. Escape velocity is defined as the speed at which an object travels to break free from either the planet?s or moon?s gravity and leave without any further propulsion. 

4.Which set of conditions represents the easiest way to liquify a gas?

  • ALow temperature and high pressure
  • BHigh temperature and low pressure
  • CLow temperature and low pressure
  • DHigh temperature and high pressure
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Correct Answer : (A)

Low temperature and high pressure

Explanation:

The easiest way to liquify a gas is at Low temperature and high pressure.

5.The instrument that measures and records the relative humidity air is

  • AHydrometer
  • BHygrometer
  • CLactometer 
  • DBarometer
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Correct Answer : (B)

Hygrometer

Explanation:

The instrument that measures and records the relative humidity air is Hygrometer.

6.The dimension [MLT-2] corresponds to

  • AForce
  • BWork done
  • CAcceleration
  • DVelocity
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Correct Answer : (A)

Force

Explanation:

The dimension [MLT-2] corresponds to Force.

7.Mist is caused by 

  • ADry ice
  • BIce at low temperature
  • CWater vapour at low temperature
  • DCarbon ? monoxide in solid form
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Correct Answer : (C)

Water vapour at low temperature

Explanation:

Mist is caused by Water vapour at low temperature.

8.While catching a ball, a player pulls down his hands to lower the ? 

  • AForce
  • BMomentum
  • CImpulse 
  • DCatching time
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Correct Answer : (B)

Momentum

Explanation:

While catching a ball, a player pulls down his hands to lower the Momentum.

9.A particle dropped from the top of a tower uniformly falls on ground at a distance which is equal to the height of tower. Which of the following paths will be traversed by the particle?

  • ACircle
  • BParabolic
  • CGreat circle
  • DHyper ? parabolic
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Correct Answer : (B)

Parabolic

Explanation:

10.When a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is due to the phenomenon of  :

  • A Evaporation
  • BVaporisation
  • CDiffusion
  • DSublimation
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Correct Answer : (C)

Diffusion

Explanation:

11.Clear nights are colder than cloudy nights because of

  • AConduction
  • BCondensation
  • CRadiation
  • DInsolation
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Correct Answer : (C)

Radiation

Explanation:

Clear nights are colder than cloudy nights because of Radiation.

12.If small raindrop falls through air

  • AIts velocity goes on increasing
  • BIts velocity goes on decreasing
  • CIts velocity goes on increasing for sometime and then becomes constant
  • DIt falls with constant speed for some time and then its velocity increases
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Correct Answer : (C)

Its velocity goes on increasing for sometime and then becomes constant

Explanation:

If small raindrop falls through air, Its velocity goes on increasing for sometime and then becomes constant.

13.A person standing at the middle point of a wooden ladder which starts slipping between a vertical wall and the floor of a room, while continuing to remain in a vertical plane. The path traced by a person standing at the middle point of the slipping ladder is

  • AA straight line  
  • BAn elliptical line
  • CA circular path 
  • DA parabolic path
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Correct Answer : (C)

A circular path

 

Explanation:

A person standing at the middle point of a wooden ladder which starts slipping between a vertical wall and the floor of a room, while continuing to remain in a vertical plane. The path traced by a person standing at the middle point of the slipping ladder is a circular path.

14.A ball is thrown upwards and it returns to ground describing a parabolic path. Which of the following remains constant? 

  • AKinetic energy of the ball  
  • BSpeed of the ball 
  • CHorizontal component of velocity
  • DVertical component of velocity 
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Correct Answer : (C)

Horizontal component of velocity

Explanation:

15.A passenger in a moving train tosses a five rupees coin. If the coin falls behind him, then the train must be moving with a uniform _____. 

  • AAcceleration  
  • BDeceleration
  • CSpeed
  • DVelocity 
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Correct Answer : (A)

Acceleration

 

 

Explanation:

A passenger in a moving train tosses a five rupees coin. If the coin falls behind him, then the train must be moving with a uniform Acceleration.

16.In which of the following cases, kinetic energy is being used in performing work? 

  • APadding the bicycle to cover a distance  
  • BDriving a car to cover a distance 
  • CWind mill grinding wheat grain 
  • DRowing a boat in the lake 
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Correct Answer : (B)

Driving a car to cover a distance

 

Explanation:

17.If the velocity ? time graph of a particle is represented by   y = mt + c, then the particle is moving with 

  • AConstant speed  
  • BConstant velocity 
  • CConstant acceleration 
  • DVarying acceleration 
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Correct Answer : (C)

Constant acceleration

 

Explanation:

18.A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to 

  • AOutward pull on him  
  • BInertia of motion 
  • CChange in momentum 
  • DChange in acceleration 
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Correct Answer : (B)

Inertia of motion

 

Explanation:

A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to Inertia of motion.

19.When pressure is increased, the melting point of ice 

  • AIncreases  
  • BDoes not change 
  • CDecreases 
  • DDepends on the impurities in the ice 
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Correct Answer : (C)

Decreases

 

Explanation:

When pressure is increased, the melting point to ice is Decreases.

20.If the distance “S” covered by a moving car in rectilinear motion with a speed  “V” in time “T” is given by  S = VT, then the car undergoes 

  • AA uniform acceleration 
  • BA non-uniform acceleration 
  • CA uniform velocity
  • DA non-uniform velocity
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Correct Answer : (C)

A uniform velocity

Explanation:

If the distance “S” covered by a moving car in rectilinear motion with a speed  “V” in time “T” is given by  S = VT, then the car undergoes A uniform velocity.