Home » General Science » General Science MCQ » Physics

1500 Important Physics MCQ Question and Answer PDF

4000 Important General Science MCQ Question & Answer in PDF Download

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

  • AThe lift is going up with an acceleration
  • BThe lift is going down with uniform speed
  • CThe lift is going up with uniform speed
  • DThe lift is going down with an acceleration
Answer / Hint Save Question Comment On Question
Correct Answer : (D)

The lift is going down with an acceleration
Explanation:

The apparent weight of a man in a lift is less the real weight when the lift is going down with an acceleration.

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

  • AGas constant
  • BStrain
  • CCo-efficient of viscosity
  • DPlanck?s constant
Answer / Hint Save Question
Correct Answer : (B)

Strain
Explanation:

3.When water freezes its density 

  • ADecreases
  • BBecomes zero
  • CRemains constant
  • DIncreases 
Answer / Hint Save Question
Correct Answer : (A)

Decreases
Explanation:

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

  • AWeight
  • BMass
  • CDensity 
  • DVolume
Answer / Hint Save Question
Correct Answer : (B)

Mass
Explanation:

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

  • A4 : 1
  • B2 : 1
  • C1 : 16
  • D1 : 4
Answer / Hint Save Question
Correct Answer : (D)

1 : 4
Explanation:

6."Parsec" is the unit of

  • ADensity of stars
  • BAstronomical distance
  • CBrightness of heavenly bodies
  • DOrbital velocity of giant stars
Answer / Hint Save Question
Correct Answer : (B)

Astronomical distance
Explanation:

7.The SI unit of luminous emittance is :

  • ALux
  • BCandela
  • CLumenLumen second
  • DLumen
Answer / Hint Save Question
Correct Answer : (A)

Lux
Explanation:

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

  • AHalf the weight at the surface
  • BZero
  • CTwice the weight at the surface
  • DInfinite
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

Zero
Explanation:

The weight of a body at the centre of earth is Zero.

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

  • AEarth spinning on its axis
  • BSimple pendulum motion
  • CBall bouncing on floor
  • DMotion of a celling fan
Answer / Hint Save Question
Correct Answer : (B)

Simple pendulum motion
Explanation:

10.Which of the following is the unit of Astronomical Distance?

  • AMetre/sec
  • BSec.
  • CPara/sec.
  • DParsec
Answer / Hint Save Question
Correct Answer : (D)

Parsec
Explanation:

11.The working principle of a washing machine is

  • ACentrifugation
  • BDialysis
  • CReverse osmosis
  • DDiffusion 
Answer / Hint Save Question Comment On Question
Correct Answer : (A)

Centrifugation
Explanation:

The working principle of a washing machine is Centrifugation.  Centrifugation is define as the action or process of using a centrifuge, typically to separate fluids of different densities or liquids from solids.

12.The absolute zero is a temperature at which  __________

  • AMolecular motion in a gas would cease
  • BWater freezes
  • CAll gases become liquid
  • DAll gases become solid
Answer / Hint Save Question Comment On Question
Correct Answer : (A)

Molecular motion in a gas would cease
Explanation:

The absolute zero is a temperature at which molecular motion in a gas would cease.

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

  • AGravitational force between train and man
  • BIllusion of the man
  • CThe centripetal force
  • DPressure difference due to fast moving air in between
Answer / Hint Save Question
Correct Answer : (D)

Pressure difference due to fast moving air in between
Explanation:

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

  • ADead centre 
  • BCentre of gravity
  • CCentre of motion
  • DCentre of mass 
Answer / Hint Save Question
Correct Answer : (C)

Centre of motion
Explanation:

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

  • AViscosity 
  • BSurface Tension
  • CPressure 
  • DUpward Thrust
Answer / Hint Save Question
Correct Answer : (D)

Upward Thrust
Explanation:

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

  • AIncreases
  • BDoes not change 
  • CFirst increases before decreasing
  • DDecreases
Answer / Hint Save Question
Correct Answer : (B)

Does not change 
Explanation:

17.Weightlessness experienced while orbiting the earth in a spaceship because of

  • AInertia 
  • BAcceleration
  • CZero gravity
  • DOrbital motion
Answer / Hint Save Question
Correct Answer : (C)

Zero gravity
Explanation:

18.Two vectors are said to be equal if

  • AOnly their magnitudes are same
  • BOnly their directions are same
  • CBoth magnitude and direction are same
  • DMagnitudes are same but directions are opposite
Answer / Hint Save Question Comment On Question
Correct Answer : (C)

Both magnitude and direction are same
Explanation:

Two vectors are said to be equal if both magnitude and direction are same.

19.Why does a cannon recoil after firing?

  • AConservation of energy
  • BBackward thrust of gases produced
  • CNewton?s third law of motion
  • DNewton?s first law of motion
Answer / Hint Save Question
Correct Answer : (C)

Newton?s third law of motion
Explanation:

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

  • A20 minutes
  • B2 hours 20 minutes
  • C3.7 hours
  • DYou cannot hear the sound of explosion
Answer / Hint Save Question
Correct Answer : (D)

You cannot hear the sound of explosion
Explanation:
4000 Important General Science MCQ Question & Answer in PDF Download

Morning Exam

Morningexam.com provides Electrical MCQs, Notes, Exam Materials and Online Test series for your Competitive exams. You can also get Current Affairs, GK, Aptitude, Verbal Ability, and Reasoning questions. Best for ITI and Diploma Students.

Quick Links

Contact us

Have questions, comments or just want to say hello:

Follow Us

Copyright 2025 All rights reserved. Developed by Sucharita Banerjee