EASY
Earn 100

The produced rays in sonography are

50% studentsanswered this correctly

Important Questions on Sound

EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
If the velocity of sound in air is 340 m s-1 and x is the minimum distance between sound source and reflecting surface to get echo from general sound, then :
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications

A person clapped his hands near a cliff and heard the echo after 4 s. The distance between the cliff and the person will be :

(Speed of sound is 346 m s-1) 

EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
Which of the following animal produce ultrasound?
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
A girl drops a ball from a height h=20 m. It strikes the ground elastically and returns to her hand. An echo of the thud of the ball striking the ground is produced from a nearby cliff. The echo is head at exactly the same moment when the ball returns to the girl's hand. (Take g = 10 ms-2  and vsound=350 ms-1). The distance of the cliff from the girls is close to:
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
The acronym ‘SONAR’ stands for
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
Sound travels at a speed of 1450 ms-1through water. A submarine detects objects around it by sending sound waves and detecting echo (reflected sound) heard after 4 s. Then the object must be at a distance of:
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
A man who is standing at a distance of 850 m from a sound reflecting surface claps loudly. If the velocity of the sound in air is 340 ms-1 then the time taken by the echo to reach him is
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
Which of the following is not based on reflection of sound?
MEDIUM
Science>Physics>Sound>Ultrasonic Sound and Its Applications
An incident sound wave strikes a reflecting surface at an angle of 50°. What is the angle between the incident wave and the reflected wave?
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
Animals like dolphin produce
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
Which kind of sound is produced in an earthquake before the main shock wave begins?
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
While performing an experiment on verifying laws of reflection of sound, a student is to choose from (i) a narrow or a wide tube, and (ii) a strong or a faint source of sound.
The observed experimental difference, between the values of angle of incidence and angle of reflection, is likely to be minimum when he chooses a
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
For verifying the laws of reflection of sound experimentally, the reflecting surface (screen) used should be
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
Sound whose frequency is below 20 Hz is called _____.
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
The repeated reflection that results in the persistence of sound is called __________________.
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
For doing the experiment on the verification of laws of reflection of sound,
EASY
Science>Physics>Sound>Ultrasonic Sound and Its Applications
Which animal does not use the method of echolocation?
MEDIUM
Science>Physics>Sound>Ultrasonic Sound and Its Applications
Multiple echoes are also called
MEDIUM
Science>Physics>Sound>Ultrasonic Sound and Its Applications

While doing an experiment on verifying the laws of reflection of sound, four students measured the angles ∠i and ∠r as shown in the diagram below. The correct measurement of the angles of incidence and angles of reflection has been done by which student?

Question ImageQuestion ImageQuestion ImageQuestion Image