Resonance occurs when

Important Questions on Sound Waves

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 21 - Sound Waves>Exercise 1>Q 33

In resonance,

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 21 - Sound Waves>Exercise 1>Q 34

Amplitude of vibration is $A=\frac{F_0}{p-q+r}.$ Resonance will occur when

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 21 - Sound Waves>Exercise 1>Q 35

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

MEDIUM

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 21 - Sound Waves>Exercise 1>Q 36

A granite rod of$60 \mathrm{cm}$length is clamped at its middle point and is set into longitudinal vibrations. The density of granite is$2.7 \times {10}^3 \mathrm{kg} {\mathrm{m}}^{-3}$and its Young's modulus is $9.27 \times {10}^{10 }\mathrm{Pa}$. What will be the fundamental frequency of the longitudinal vibrations ?

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 21 - Sound Waves>Exercise 1>Q 37

An earthquake generates both transverse ($S$) and longitudinal ($P$) sound waves in the earth. The speed of $S$ waves is about $4.5 \mathrm{km} {\mathrm{s}}^{-1}$ and that of $P$ waves is about $8.0 \mathrm{km} {\mathrm{s}}^{-1}$. A seismograph records $P$ and $S$ waves from an earthquake. The first $P$ wave arrives $4.0 \min$ before the first $S$ wave. The epicenter of the earthquake is located at a distance of about,

EASY

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 21 - Sound Waves>Exercise 1>Q 38

Bulk modulus of sea water should be approximately $\left({\mathrm{\rho }}_{\text{water }}=1000 \mathrm{kg} {\mathrm{m}}^{-3}\right)$ if velocity of sound in water is $1050 \mathrm{m} {\mathrm{s}}^{-1}$.

MEDIUM

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 21 - Sound Waves>Exercise 1>Q 39

The ratio of the speed of sound in a monoatomic gas to that in water vapours at any temperature is (when the molecular weight of gas is $40 \mathrm{g} {\mathrm{mol}}^{-1}$ and for water vapours is $18 \mathrm{g} {\mathrm{mol}}^{-1}$)

MEDIUM

KCET (UG)

IMPORTANT

Physics Crash Course KCET (UG)>Chapter 21 - Sound Waves>Exercise 1>Q 40

The ratio of speed of sound in neon to that in water vapours at any temperature (when molecular weight of neon is $2.02\times {10}^{-2} \mathrm{kg}{ \mathrm{mol}}^{-1}$ and for water vapours is $1.8\times {10}^{-2} \mathrm{kg}{ \mathrm{mol}}^{-1}$),