When the source of sound moves away form a stationary listener then ______________ occurs?

A. An apparent increase in frequency
B. An apparent decrease in frequency
C. An apparent decrease in wavelength
D. No apparent change in frequency

Which one is the correct relation for fundamental frequency of open and closed pipe ?

A. Fopen = 2 fclosed
B. Fclosed = 2fopen
C. Fopen = fclosed
D. Fopen = 1 / f closed

Newton estimated the speed of sound _____________________?

A. 281m/sec
B. 333m/sec
C. 340m/sec
D. All of the above

The speed of sound in hydrogen is _____________ time than that in oxygen?

A. Two times
B. Three times
C. Four time
D. Six time

The speed of stationary waves in a stretched string are independent of___________________?

A. Number of loops
B. Tension in the string
C. Point where string is plucked
D. Both a and c

Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?

A. Dopplers effect
B. Interference of waves
C. Beats phenomena
D. All of these

The waves that require a material medium for their propagation are called__________________?

A. Matter waves
B. Electromagnetic waves
C. Carrier waves
D. Mechanical waves

The number of beats produced per second is equal to____________________?

A. The sum of the frequencies of two tuning forks
B. The difference of the frequencies of two tuning forks
C. The ratio of the frequencies of two tuning forks
D. The frequency of either of the two tuning forks

In vibrating cord the points where the amplitude is maximum, are called ___________________?

A. Antinodes
B. Nodes
C. Troughs
D. Crests

A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________?

A. Always an node in formed
B. Always an antinode is formed
C. Neither node nor antinode is formed
D. Sometimes a node and sometimes an antinode is formed