Class 8 NSO/Sound/Physics Quiz

A wave of frequency 1000 Hz travels between X and Y, a distance of 600 m in 2 seconds. The number of wavelengths there in distance XY:

• 100
• 500
• 10000
• 2000

Echo is a type of

• reflected sound

• refracted sound

• neither reflected sound nor refracted sound

What will be the wave velocity, if the radar gives 54 waves per min and wavelength of the given wave is 10m ?

• 5 m/s

• 6 m/s

• 9 m/s

• 15 m/s

A special device which is used to find the depth of sea is called:

• RADAR

• SONAR

• Reverberation

The special technique used in ships to calculate the depth of ocean beds is ......

• Reverberation

• radar
• lidar
• ultrasound

................... is the characteristic of a musical sound by which a loud sound can be distinguished from a faint sound even though both have the same pitch .

• Loundness

• Pitch

• Quality

A shrill sound has a pitch and a dull sound has a pitch.

• high, low

• low, high

• low, low

If the direction of the vibration of particles is parallel to the direction of the propagation of wave, then the wave is a ...

• transverse wave

• longitudinal wave

• electromagnetic wave

• All the above.