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Q:

Which of the following represents a relation for ‘heat lost = heat gained’?

 

A) Principle of thermal equilibrium B) Principle of colors
C) Principle of calorimetry D) Principle of vaporization
 
Answer & Explanation Answer: C) Principle of calorimetry

Explanation:

Heat lost by hot object = Heat gained by cold object

where we ignore heat gained or lost from/to the surroundings.

The study of heat gained and lost in this manner is often called Calorimetry.

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Q:

Echoes may be heard more than once due to successive or multiple

 

A) Rarefactions B) Reflections
C) Diffractions D) Refractions
 
Answer & Explanation Answer: B) Reflections

Explanation:
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Q:

Which of the following statements is true?

The velocity of sound is :

 

A) less in summer than in winter B) same in winter and summer
C) independent of seasons D) more in summer than in winter
 
Answer & Explanation Answer: D) more in summer than in winter

Explanation:
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Q:

Sound waves can not travel through a

 

A) copper wire placed in air B) silver slab placed in air
C) glass prism placed in water D) wooden hollow pipe placed in vacuum
 
Answer & Explanation Answer: D) wooden hollow pipe placed in vacuum

Explanation:

Sound is a kind of energy created when something vibrates. When this vibration reaches an ear, it is translated into what we recognize as a sound. Sound vibration must travel through matter. Therefore, it can travel through air and water but not through vacuum.

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Q:

The filament of a light bulb is made up of

 

A) Platinum B) Tantalum
C) Tungsten D) Antimony
 
Answer & Explanation Answer: C) Tungsten

Explanation:
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Q:

____ is not a type of heat transfer.

 

A) Diffusion B) Reflection
C) Convection D) Radiation
 
Answer & Explanation Answer: B) Reflection

Explanation:
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Q:

Seismic waves are recorded by an instrument called the ________________.

 

A) seismograph B) odograph
C) isograph D) lithograph
 
Answer & Explanation Answer: A) seismograph

Explanation:
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Q:

Nuclear sizes are expressed in a unit named

A) Fermi B) Angstrom
C) Newton D) Tesla
 
Answer & Explanation Answer: A) Fermi

Explanation:

Nuclear sizes are expressed in a unit called "Fermi" which is a unit of length equal to 10−15 metre (one femtometre), used in nuclear physics. It is similar to the diameter of a proton.

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