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1500 Important Physics MCQ Question and Answer PDF

4000 Important General Science MCQ Question & Answer in PDF Download

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

  • AIts kinetic energy remains constant
  • BIts momentum remains constant
  • CVertical component of its velocity remains constant
  • DHorizontal component of its velocity remains constant
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Correct Answer : (D)

Horizontal component of its velocity remains constant
Explanation:

2.Absolute Zero temperature is defined as

  • AThe temperature at which all molecular motion ceases
  • BAt which water boils at 298K
  • CAt which liquid Helium boils
  • DAt which the volume becomes zero
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Correct Answer : (A)

The temperature at which all molecular motion ceases
Explanation:

Absolute Zero temperature is defined as The temperature at which all molecular motion ceases.

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

  • AConstant acceleration
  • BConstant velocity
  • CConstant kinetic energy
  • DConstant displacement
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Correct Answer : (C)

Constant kinetic energy
Explanation:

A body moving in a circular path with a constant speed has a Constant kinetic energy. When a body is moving in a circular motion with constant speed, the direction of it continuously changes and hence velocity(v), momentum(p), and acceleration change because they are vectors and their direction changes. only as kinetic energy is a scalar, it remains constant.

4.One nanometre is equal to  __________ metres.

  • A10 raised to the power (-3)
  • B10 raised to the power (-6)
  • C10 raised to the power (-9)
  • D10 raised to the power (-12)
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Correct Answer : (B)

10 raised to the power (-6)
Explanation:

5.Acceleration is

  • AInversely proportional to force
  • BDirectly proportional to force 
  • CInversely proportional to mass
  • DDirectly proportional to mass
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Correct Answer : (D)

Directly proportional to mass
Explanation:

6.What is the Earth?s escape velocity?

  • A2.8 km/s
  • B5.6 km/s
  • C11.2 km/s
  • D14 km/s
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Correct Answer : (C)

11.2 km/s
Explanation:

7.An object is in static equilibrium when it is  _________

  • AAt rest
  • BMoving in a circular path
  • CMoving with uniform velocity
  • DAccelerating at high speed
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Correct Answer : (A)

At rest
Explanation:

8.When net torque is zero,  _________  will be constant

  • AForce
  • BAngular momentum
  • CLinear momentum
  • DAccelerating
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Correct Answer : (B)

Angular momentum
Explanation:

9.Newton?s first law is also known as  _________ .

  • ALaw of Friction
  • BLaw of Momentum
  • CLaw of Inertia
  • DLaw of Motion
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Correct Answer : (C)

Law of Inertia
Explanation:

10.Acceleration due to energy on a planet decreases with _________ .

  • ADecrease in radius of the planet
  • BIncrease in mass of the planet
  • CDecrease in mass of the body
  • DIncrease in altitude from surface of the planet
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Correct Answer : (D)

Increase in altitude from surface of the planet
Explanation:

Acceleration due to energy on a planet decreases with Increase in altitude from surface of the planet.

11.The boiling point of water decreases at higher altitudes is due to

  • AHigh temperature
  • BLow atmospheric pressure
  • CLow temperature
  • DHigh atmospheric pressure
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Correct Answer : (B)

Low atmospheric pressure
Explanation:

12.An example of a solution of liquid in solid is :

  • ASmoke
  • BJelly
  • CRubber
  • DFoam
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Correct Answer : (B)

Jelly
Explanation:

13.What will happen to the level of water in a vessel when a piece of ice floating in melts?

  • ADecreases
  • BIncrease
  • CRemains same
  • DFirst increases and then decreases
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Correct Answer : (C)

Remains same
Explanation:

14.Which of the following quantity is a measure of inertia?

  • AVelocity
  • BAcceleration
  • CMass
  • DWeight
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Correct Answer : (C)

Mass
Explanation:

15.Action and reaction  _________ .

  • AAlways act on same body
  • BAre equal in magnitude
  • CAre in same direction
  • DAlways act independently
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Correct Answer : (B)

Are equal in magnitude
Explanation:

16.Maxwell is the unit of which one of the following?

  • AMagnetic flux
  • BPermeability
  • CMagnetic susceptibility
  • DIntensity of magnetisation
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Correct Answer : (A)

Magnetic flux
Explanation:

17.Which of the following is not a characteristic of solid?

  • AHigh compressibility
  • BHigh density
  • CRegular shape
  • DHigh rigidity
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Correct Answer : (A)

High compressibility
Explanation:

18.Which of the following is not a vector quantity?

  • AAcceleration
  • BElectric current
  • CForce
  • DVelocity
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Correct Answer : (B)

Electric current
Explanation:

19.Which of the following is not a vector quantity?

  • AMomentum
  • BDisplacement
  • CTorque
  • DSpeed
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Correct Answer : (D)

Speed
Explanation:

20.It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?

  • ALaw of inertia
  • BNewton?s second law
  • CNewton?s third law
  • DPascal?s law
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Correct Answer : (C)

Newton?s third law
Explanation:
4000 Important General Science MCQ Question & Answer in PDF Download

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