 # Physics Practical Class 11 - To find the speed of sound in air at room temperature using a resonance tube by two resonance positions. Viva Questions with Answers

1) What is the working principle of the resonance tube?

Resonance of the air column with a tuning fork is the principle on which the resonance tube works. Basically, it is used to find the speed of sound in air at room temperature.

2) All waves require a material medium for their propagation. Is it true or false?

This statement is false because only material waves require a material medium for propagation. On the other hand, electromagnetic waves do not require any medium. In the form of electric and magnetic fields, they can travel through a vacuum.

3) What is the frequency?

The number of cycles completed in one second is known as frequency. Hertz (Hz) is the unit of frequency, and it is also known as cycles per second (cps).

4) What is amplitude?

The maximum amount of displacement of a particle from its resting position in a particular medium is referred to as amplitude. In other words, the total distance from the ground of a wave (trough) to the top of the wave (crest) is known as amplitude.

5) What will happen to the speed of sound in the medium if the source of sound moves towards the observer?

The speed of the sound will remain the same because it does not depend on the speed of the source creating the sound. Rather, it depends on the properties of the medium, like bulk modulus and density.

6) What types of waves will be produced in the air column in this experiment (To find the speed of sound in air at room temperature using a resonance tube by two resonance positions)?

In the air column, longitudinal stationary waves will be produced.

7) The apparent frequency will differ from the actual frequency if both the source of sound and observer are moving. Is it true or false?

The given statement is false because apparent frequency only fluctuates in the case of relative motion. If there is zero relative motion between observer and source, then there will be no change in frequency heard.

8) Will the results of the given experiment (To find the speed of sound in air at room temperature using a resonance tube by two resonance positions) be affected if other liquids are used in place of water?

No, the results will not be affected.

9) What do you mean by sound intensity?

Sound per unit area is known as sound intensity.

10) What is the full form of SPL?

The full form of SPL – Sound Pressure Level is a logarithmic measure of the actual pressure of a sound relative to a reference value. A sound level meter called a dB is a meter used to measure sound pressure levels.