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.Management Sciences
Category: Waves
Sound waves do not travel in vacuum because ___________________?
A. they are transverse waves
B. they are stationary waves
C. they require material medium for propagation
D. they do not have enough energy
The velocity of sound is greatest in___________________?
A. Water
B. air
C. copper
D. ammonia
The dimension of elastic modulus is ___________________ ?
A. ML-1T-2
B. ML-2T-2
C. MLT-2
D. ML2T-2
Silence zone takes place due to____________________?
A. constructive interference
B. destructive interference
C. beats
D. resonance
When two identical traveling waves are superimposed, the velocity of the resultant wave__________________?
A. decreases
B. increases
C. remains unchanged
D. becomes zero
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
Ultrasonic have__________________?
A. frequency in the audible range
B. frequency is greater than 20 kHz
C. frequency lower than 20 Hz
D. all of above
Velocity of sound in vacuum is ____________________?
A. 332 ms-1
B. 320 ms-1
C. Zero
D. 224 ms-1
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
Increase in velocity of sound in the air for 1°C rise in temperature is_________________?
A. 1.61 ms-1
B. 61.0 ms-1
C. 0.61 ms-1
D. 2.00 ms-1
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