Two waves are approaching each other with a velocity of 20m/s and frequency n. The distance between two consecutive nodes is
20/n
10/n
5/n
n/10
The frequency of sinusoidal wave, 0.40 cos (2000t + 0.80) would be
1000π Hz
2000 Hz
20 Hz
1000/π Hz
A hospital uses an ultrasonic scanner to locate tumours in a tissue. The operating frequency of the scanner is 4.2 MHz. The speed of sound in a tissue is 1.7 km/s. The wavelength of sound in tissue is close to.
4 × 10-4m
8 × 10-4m
4 × 10-3m
8 × 10-3m
A closed organ pipe (closed at one end) is excited to support the third overtone. It is found that air in the pipe has.
Three nodes and three antinodes
Three nodes and four antinodes
Four nodes and three antinodes
Four nodes and four antinodes
With the propagation of a longitudinal wave through a meterial medium, the quantities transmitted in the propagation direction are
Energy, momentum and mass
Energy
Energy and mass
Energy and linear momentum
Equation of progressive wave is given by
Then which of the following is correct?
v = 5 cm
λ = 18 cm
a = 0.04 cm
ƒ = 50 Hz
A star which is emitting radiation at a wavelength of 5000 Å is approaching the earth with a velocity of 1.50 × 106 m/s. The change in wavelength of the radiation as received on the earth is
0.25 Å
2.5 Å
25 Å
250 Å
Velocity of sound waves in air is 330 m/s. For a particular sound wave in air, path difference of 40 cm is equivalent to phase difference of 1.6π. The frequency of this wave is.
165Hz
150 Hz
660 Hz
330 Hz
Two waves are said to be coherent, if they have
Same phase but different amplitude
Same frequency but different amplitude
Same frequency, phase and amplitude
Different frequency, phase and amplitude
