Laws of Reflection of Sound
 1) The wave property of sound which remains the same after reflection: Velocity Wavelength Frequency All of these

 2) Which of the following is carried by waves from one place to another? Mass Velocity Wavelength Energy

 3) If the air in the experimental room warms up, what happens to the speed of sound in it? Increases. Decreases. Remains the same. Can't be predicted.

 4) In which medium would you be able to hear sound in the experiment? From the air. From the metal tube. From the wooden plank. From the air and metal tube.

 5) Which of the following is true in the case of reflection of sound? ∠i = ∠r ∠i > ∠r Does not obey the law of reflection

 6) When the sound is allowed to fall normally on the reflecting surface, what is the angle at which the intensity of sound is the maximum? 60° 0° 30° 90°

 7) In which medium would you be able to hear the sound in the experiment? From the air. From the metal tube. From the wooden plank. From the air and the metal tube.

 8) What is the phenomenon of the echo of sound waves due to? Reflection Refraction Interference All of these

 9) When a sound wave propagates, which physical quantity changes in the medium? Only density. Only pressure. Both density and pressure. Other than density and pressure.

 10) What does the speed of sound in medium depend on? Temperature. Pressure. Neither temperature nor pressure. Both temperature and pressure of medium.

 11) Soft surfaces are: Bad reflectors of sound. Good reflectors of sound. Neither bad nor good reflectors. Partial reflector of sound.

 12) The property of reflection and refraction is associated with which kind of wave? Sound waves only Light waves only Both (a) and (b) Neither (a) nor (b)

 13) What are the parameters that affect the velocity of sound in a medium? Density. Elasticity. Density and elasticity. None of these.

 14) Where is the sound directed in the experiment of Verification of Laws of Reflection of Sound? Axis of the tube. Normal to the axis of tube. All of these. None of these.

 15) What happens when sound is reflected from a surface? The angle of reflection is always more than the angle of incidence. The angle of reflection is always less than the angle of incidence. The angle of reflection is always equal to the angle of incidence. The angle of reflection is always equal to 90°.

 16) Which types of surfaces are needed for the reflection of a sound wave? Polished and smooth surface. Require hard surface only. Polished and rough surface. Require hard surface, polished rough surface.

 17) Reflection of sound is utilized in the working of which of the following devices? Megaphone. Stethoscope. Sound board. All of these.

 18) What sound should you hear while doing the experiment? The direct sound from the clock. The sound reflected from any reflecting surface. The sound coming through the tube after reflection. Any of these.

 19) If the reflecting surface and the source of sound both are in the plane of the table, what should the position of the ear of the observer be? On the same plane. On the plane at an angle of 30° to the table. On the plane at an angle of 90° below the table. Perpendicularly above the source.

 20) The wave property of sound which responses to the ear Intensity Loudness Pitch Amplitude

 21) How is sound is produced? By the vibration of different objects. Without creating any vibration. Rest position of object. All of these.

 22) What happens in sound propagation? Energy of sound travels through the medium. Particles of the medium travel. All of these. None of these.

 23) The persistence of sound in an auditorium is the result of what factor? Single reflection of sound. Repeated reflections of sound. Repeated refractions of sound. Vibration of objects placed in an auditorium.

 24) Devu, while verifying the laws of reflection of sound, measured the angle between the incident sound wave and reflected sound wave to be 130°. What is the angle of incidence? Data insufficient 65° 130° 25°

 25) Which of the following is correct? Sound waves and light waves are both longitudinal waves. Sound waves are longitudinal and light waves are transverse. Sound waves are transverse light waves are longitudinal. Both sound waves and light waves are transverse.

Cite in Scientific Research:

Nedungadi P., Raman R. & McGregor M. (2013, October). Enhanced STEM learning with Online Labs: Empirical study comparing physical labs, tablets and desktops. In Frontiers in Education Conference, 2013 IEEE (pp. 1585-1590). IEEE.

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