# Chapter 5: Acoustics - Online Test

Q1. When a sound wave travels through air, the air particles
Explaination / Solution:
No Explaination.

Q2. Velocity of sound in a gaseous medium is 330 m s–1. If the pressure is increased by 4 times without causing a change in the temperature, the velocity of sound in the gas is
Explaination / Solution:
No Explaination.

Q3. The frequency, which is audible to the human ear is
Explaination / Solution:
No Explaination.

Q4. The velocity of sound in air at a particular temperature is 330 m s–1. What will be its value when temperature is doubled and the pressure is halved?
Explaination / Solution:
No Explaination.

Q5. If a sound wave travels with a frequency of 1.25 × 104 Hz at 344 m s–1, the wavelength will be
Explaination / Solution:
No Explaination.

Q6. The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
Explaination / Solution:
No Explaination.

Q7. Velocity of sound in the atmosphere of a planet is 500 m s–1. The minimum distance between the sources of sound and the obstacle to hear the echo, should be
Explaination / Solution:
No Explaination.