Waves and Sound

A speeding motorcyclist sees traffic jam ahead of him. He slows down to $36km/hour.$ He finds that traffic has eased and a car moving ahead of him at $18km/hour$ is honking at a frequency of $1392Hz.$ If the speed of…

A uniform rope of length $L$ and mass $m_{1}$, hangs vertically from a rigid support. A block of mass $m_{2}$ is attached to the free end of the rope. A transverse pulse of wavelength $\lambda\,_{1}$ is produced at the…

If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is:

Match List I with List II List I List II A Troposphere I Approximate$65-75km$over Earth's surface B E-Part of Stratosphere II Approximate$300km$over Earth's surface C $F_{2}$-Part of Thermosphere III…

An amplifier has a voltage gain $A_V=1000$. The voltage gain in $\mathrm{dB}$ is

A tuning fork with frequency $800 \mathrm{~Hz}$ produces resonance in a resonance column tube with upper end open and lower end closed by water surface. Successive resonance are observed at length $9.75 \mathrm{~cm},…

A pipe open at both ends has a fundamental frequency $f$ in air. The pipe is now dipped vertically in a water drum to half of its length. The fundamental frequency of the air column is now equal to :

The fundamental frequency of a closed organ pipe of length \$20 cm$ is equal to the second overtone of an organ pipe open at both the ends. The length of the organ pipe open at both the ends is

A tuning fork is used to produce resonance in glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of \$27^{o}C$ two successive resonances are produced at…

The number of possible natural oscillations of air column in a pipe closed at one end of length \$85cm$ whose frequencies lies below \$1250Hz$ are: (velocity of sound \$=340ms^{-1}$)

A source of sound S emitting waves of frequency 100 Hz and an observer O are located at some distance from each other. The source is moving with a speed of 19.4 m s-1 at an angle of 60o with the source observer line as…

An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is \$50\text{cm}$. The next larger length of the column resonating with the same tuning fork is: