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1500 Important Physics MCQ Question and Answer PDF

4000 Important General Science MCQ Question & Answer in PDF Download

1.The Amount of water vapour in the atmosphere is measured in terms of 

  • AHumidity
  • BDroplets
  • CSmog
  • DAll of the above
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Correct Answer : (A)

Humidity
Explanation:

2.The density of the liquid when heated

  • ADecreases
  • BIncreases
  • CDoes not change
  • DMay increase or decrease depending on pressure
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Correct Answer : (A)

Decreases
Explanation:

The density of the liquid when heated is decreases.

3.When hot-water is sprinkled on a hotter glass tumbler, it breaks because

  • AGlass suddenly expands
  • BGlass suddenly contracts 
  • CWater evaporates
  • DGlass reacts chemically with water
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Correct Answer : (B)

Glass suddenly contracts 
Explanation:

When hot-water is sprinkled on a hotter glass tumbler, it breaks because Glass suddenly contracts.

4.Mud houses are cooler in summers and warmer in winters as compared to brick houses because

  • AMud is a good conductor
  • BMud is a bad conductor
  • CMud is a poor insulator
  • DEvaporation of water causes cooling in summers and sunlight coming through holes causes warming in winters
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Correct Answer : (B)

Mud is a bad conductor
Explanation:

5.Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be

  • AAt a higher level in water
  • BAt a higher level in alcohol
  • CAt the same level in both
  • DFloating in alcohol and sinking in water
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Correct Answer : (A)

At a higher level in water
Explanation:

6.What is the principle of a "Life Jacket"?

  • AIt provides oxygen to a drowning person
  • BIt increases the volume of the person to keep him afloat
  • CIt decreases the volume of the person to keep him afloat
  • DThe person can sit on it like a raft
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Correct Answer : (B)

It increases the volume of the person to keep him afloat
Explanation:

It increases the volume of the person to keep him afloat.

7.A sphere rolls down on two inclined planes of different angles but same height, it does so

  • AIn the same time
  • BWith the same speed
  • CIn the same time with the same speed
  • DIn the same time with the same kinetic energy
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Correct Answer : (B)

With the same speed
Explanation:

8.A rubber ball is dropped from a height of 2 meters. To what height will it rise if there is no loss of energy / velocity after rebounding?

  • A4 meters
  • B3 meters
  • C2 meters
  • D1 meter
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Correct Answer : (C)

2 meters
Explanation:

9.When a pall of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is

  • ABelow a certain minimum value irrespective of amount of water in the pail
  • BAbove a certain minimum value irrespective of amount of water in the pail
  • CAbove a certain minimum value depending on amount of water in the pail
  • DBelow a certain minimum value depending on amount of water in the pail
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Correct Answer : (B)

Above a certain minimum value irrespective of amount of water in the pail
Explanation:

10.Who enunciated the laws of planetary motion?

  • ANicolaus Copernicus
  • BJohannes Kepler
  • CIsaac Newton
  • DGalileo
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Correct Answer : (B)

Johannes Kepler
Explanation:

Johannes Kepler enunciated the laws of planetary motion.

11.When a person sitting on a swing stands up on the swing, the frequency of oscillation

  • ADecreases
  • BIncreases
  • CBecomes infinite
  • DDoes not change
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Correct Answer : (B)

Increases
Explanation:

12.An aircraft can perform aerobatic manoeuvres in a vertical loop because of 

  • AGravity
  • BCentripetal force
  • CWeight
  • DCentrifugal force
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Correct Answer : (A)

Gravity
Explanation:

13.Which conservation principle is applicable in the case of the motion of a rocket?

  • AConservation of mass
  • BConservation of charg
  • CConservation of linear momentum
  • DConservation of angular momentum
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Correct Answer : (C)

Conservation of linear momentum
Explanation:

14.It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because

  • AWeights of buckets are balanced
  • BCentre of gravity falls within the body
  • CCentre of gravity and Centre of equilibrium fall within the feet
  • DResultant weight of buckets is zero
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Correct Answer : (C)

Centre of gravity and Centre of equilibrium fall within the feet
Explanation:

It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because Centre of gravity and Centre of equilibrium fall within the feet.

15.An athlete runs before long jump to get advantage on

  • AInertia of motion
  • BFrictional force
  • CMoment of a force
  • DPrinciple of moments
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Correct Answer : (A)

Inertia of motion
Explanation:

An athlete runs before long jump to get advantage on Inertia of motion.

16.A pilot has to release the bomb to hit a target

  • ARight above the target
  • BBeyond the target
  • CBefore the target
  • DNone of these
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Correct Answer : (C)

Before the target
Explanation:

A pilot has to release the bomb to hit a target Before the target.

17.A "light year" is a measure of :

  • ASpeed
  • BVelocity 
  • CDistance
  • DTime
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Correct Answer : (C)

Distance
Explanation:

A "light year" is a measure of  Distance.

18.A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments

  • AIs zero
  • BDepends on the total mass of all the fragments
  • CDepends on the speeds of various fragments
  • DIs infinity
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Correct Answer : (A)

Is zero
Explanation:

19.The slope of a velocity-time graph represents

  • AAcceleration
  • BDisplacement
  • CDistance
  • DSpeed
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Correct Answer : (A)

Acceleration
Explanation:

The slope of a velocity-time graph represents Acceleration.

20.How much mechanical work must be done to completely melt 1 gram of ice at 00C?

  • A4.2 J
  • B80 J
  • C336 J
  • D2268 J
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Correct Answer : (B)

80 J
Explanation:
4000 Important General Science MCQ Question & Answer in PDF Download

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