Vibration of which among the following produces only odd harmonics?
A. A vibrating rod fixed at two ends
B. A vibrating string fixed at two ends
C. An air column in a closed organ pipe
D. An air column in an open organ pipe
Select an option to see the answer and solution.
A sound wave has a frequency of 3.5 kHz and its wavelength is 0.1 m. So how much time required to cover a distance of 700 meters?
A. 1.5 seconds
B. 1 second
C. 3.0 seconds
D. 2.0 seconds
Select an option to see the answer and solution.
Diffraction effect are more easily defected in case of a sound wave than light waves because
A. sound wave are longitudinal
B. sound waves have smaller wavelength
C. sound waves have larger wavelength
D. Sound waves are transverse
Select an option to see the answer and solution.
In which medium, velocity of sound is maximum?
A. Metals
B. Air
C. Water
D. Polymer
Select an option to see the answer and solution.
Statement I Sound waves can travel through vacuum.
Statement II Light is an electromagnetic wave and can travel through vacuum.
A. Both the statements are true and statement II is the correct explanation of statement I
B. Both the statements are true, but statement II is not the correct explanation of statement I
C. Statement I is true, but statement II is false
D. Statement I is false, but statement II is true
Select an option to see the answer and solution.
If the frequency of a sound wave is increased at a given velocity, what is the effect on its wavelength?
A. The wavelength will continue to increase and decrease gradually
B. Its wavelength will increase
C. There will be no effect on the wavelength
D. Its wavelength will decrease
Select an option to see the answer and solution.
What is the frequency of the wave if the time interval of the vibrating object is 0.04 seconds?
A. 250 Hz
B. 25 Hz
C. 20 Hz
D. 200 Hz
Select an option to see the answer and solution.
The frequency of an ultrasonic sound wave is greater than . . . . . . . .
A. 2000 Hz
B. 20 Hz
C. 200 Hz
D. 20000 Hz
Select an option to see the answer and solution.
In case of a forced vibration, the resonance wave becames very sharp when the
A. restoring force is small
B. applied force is small
C. quality factor is small
D. damping force is small
Select an option to see the answer and solution.
Among the following materials, sound travels fastest in
A. steel
B. air
C. vacuum
D. water
Select an option to see the answer and solution.
Speed of sound is the greatest in
A. water
B. air
C. glass
D. glycerine
Select an option to see the answer and solution.
Which of the following statements about the speed of sound in different mediums is/are true at 25°C?
A. Speed of sound in steel is 5960 m/s.
B. The speed of sound in nickel is 6240 m/s.
A. Only A is correct
B. Neither A nor B is correct
C. Both A and B are correct
D. Only B is correct
Select an option to see the answer and solution.
What are the sound waves in the air-
A. Romoted
B. Transverse
C. Longitudinal
D. The long
Select an option to see the answer and solution.
Which one of the following waves is used for detecting forgery in currency notes?
A. Ultraviolet waves
B. Infrared waves
C. Radio waves
D. Microwaves
Select an option to see the answer and solution.
Sound travels fastest in which of the following mediums?
A. solid matter
B. vacuum
C. liquids
D. gases
Select an option to see the answer and solution.
Compared to audible sound waves, ultrasound waves have
A. higher speed
B. higher frequency
C. Both A and B
D. long wavelength
Select an option to see the answer and solution.
The time period of a second pendulum is
A. 1 second
B. 2 seconds
C. 0.5 second
D. 1.5 seconds
Select an option to see the answer and solution.
The device that uses ultrasonic waves to measure the distance, direction and speed of underwater objects is called:
A. RADAR
B. MASER
C. CRO
D. SONAR
Select an option to see the answer and solution.
Speed of sound is maximum in . . . . . . . .
A. vacuum
B. gas
C. solid
D. liquid
Select an option to see the answer and solution.
Transverse waves can propagate
A. in a gas but not in a metal
B. both in a gas and in a metal
C. not in a gas but in a metal
D. neither in a gas nor in metal
Select an option to see the answer and solution.