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 Physics Questions

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Q:

The gravitational force of attraction between two bodies is __________________ the product of their masses.

 

A) directly proportional to the square of B) inversely proportional to
C) inversely proportional to the square of   D) directly proportional to  
 
Answer & Explanation Answer: D) directly proportional to  

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Q:

The power of _____________ is expressed in terms of a magnitude on a scale called Richter scale.

 

A) a tornado   B) a volcano  
C) an earthquake   D) a thunderstorm
 
Answer & Explanation Answer: C) an earthquake  

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Q:

The value of acceleration due to gravity (g) ____.

 

A) is greater at the poles than at the equator B) is lesser at the poles than at the equator
C) is greater at the North pole than at the South pole D) is greater at the South pole than at the North pole
 
Answer & Explanation Answer: A) is greater at the poles than at the equator

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Q:

The basic reason for the extraordinary sparkle of suitably cut diamond is that

A) it has well defined cleavage planes B) it has a very high transparency
C) it has a very high refractive index D) it is very hard
 
Answer & Explanation Answer: C) it has a very high refractive index

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Q:

Air pressure is usually highest when the air is 

A) warm and moist B) cool and dry
C) warm and dry D) cool and moist
 
Answer & Explanation Answer: D) cool and moist

Explanation:

Both warmth and moisture reduce the density of air and hence its pressure is high.

                                  Air_pressure_is_usually_highest_when_the_air_is1558073685.png image

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Q:

Sound following a flash of lightning is called

A) Stoning B) Bolting
C) Thunder D) Cloud clash
 
Answer & Explanation Answer: C) Thunder

Explanation:

The Sound Following the flash of lighting is because of Thunder.

 

Lightning is seen earlier than thunder because light travels much faster than sound.

 

The roar of thunder is the result of a shock wave produced when lightning super-heats the air through which it passes, causing that air to expand very rapidly. This rapid expansion of air creates a shock wave that travels outward at close to the speed of sound.

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Q:

The relative density of a substance is the ____.

 

A) ratio of its density to the density of water B) ratio of the density of water to its density
C) product of the density of water to its density D) ratio of the volume of water to its volume
 
Answer & Explanation Answer: A) ratio of its density to the density of water

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Q:

____ is not an example of refraction of light.

 

A) Twinkling effect of stars B) Mirages
C) Lateral inversion D) Bending of light while passing through a medium
 
Answer & Explanation Answer: C) Lateral inversion

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