Science Physics MCQ-180

Science-Physics MCQ Quiz for NDA/Na,SSC CGL,UPPSC,JKPSC,CivilsPrelims Exams



When mechanical waves have a frequency below the audible range, they are called :

 
 
 
 

Which waves are used in sonography?

 
 
 
 

The sound carried by air from a sitar to a listener is a wave of the following type :

 
 
 
 

Sound waves do not show in air :

 
 
 
 

With the rise of temperature, the velocity of sound:

 
 
 
 

Velocity of sound will be :

 
 
 
 

The velocity of sound is largest in :

 
 
 
 

Supersonic planes fly :

 
 
 
 

Resonance is an example of:

 
 
 
 

Buzzing of a mosquito is :

 
 
 
 

Quality of sound depends upon its :

 
 
 
 

Pitch of sound depends upon it;

 
 
 
 

Decibel is:

 
 
 
 

The law applicable for determining the apparent change in frequency when a source and an observer are in motion is :

 
 
 
 

Doppler’s effect of sound is produced when the source and the observer are :

 
 
 
 

The Doppler effect is applicable for :

 
 
 
 

To a stationary man the frequency of a sound source moving towards the man appears to be :

 
 
 
 

The main cause of difference between Doppler effect in sound and light is :

 
 
 
 

When a sound source is in motion and observer is at rest then the cause of apparent change in frequency is :

 
 
 
 

Which of the following is not the use of Doppler effect?

 
 
 
 

Which quantity remains constant in the phenomenon of refraction?

 
 
 
 

The absolute refractive index is maximum for:

 
 
 
 

The inference derived from the refraction of light is that:

 
 
 
 

The Plank’s Quantum theory was experimentally verified by :

 
 
 
 

As a result of hole in the ozone belt: