Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 11

# The Bulk Modulus and the Density of Water Are Greater than Those of Air. with this Much of Information, We Can Say that Velocity of Sound in Air - Physics

MCQ

The bulk modulus and the density of water are greater than those of air. With this much of information, we can say that velocity of sound in air

#### Options

• is larger than its value in water

• is smaller than its value in water

•  is equal to its value in water

• cannot be compared with its value in water.

#### Solution

cannot be compared with its value in water.

If is the bulk modulus and ρ is the density, then the velocity of sound is given by:

$Velocity = \sqrt{\frac{B}{\rho}}$

If both B and ρ are greater, then we cannot compare $\frac{2B}{2\rho} = \frac{3B}{3\rho} = \frac{B}{\rho}$

For proper comparison, we need numerical values.

Concept: Wave Motion
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#### APPEARS IN

HC Verma Class 11, 12 Concepts of Physics 1
Chapter 16 Sound Waves
MCQ | Q 3 | Page 351