The speed of a wave in a medium is 760 m/s. If 3600 waves are passing througha point in the medium in 2 min, then their wavelength is
13.8 m
25.3 m
41.5 m
57.2m
For production of beats the two sources must have.
Different frequencies and same amplitude
Different frequencies
Different frequencies, same amplitude and same phase
Different frequencies and same phase
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
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
A 5.5m length of string has a mass of 0.035 kg. If the tension in the string is 77N, the speed of a wave on the string is
110ms-1
165 ms-1
77 ms-1
102 ms-1
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
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
The transverse wave represented by the equation y = 4 sin π/6 sin (3x - 15t) has
Amplitude = 4π
Wavelength = 4π/3
Speed of propagation = 5
Period = π/15
From a wave equation
y = 0.5 sin 2π/3.2 (64t - x),
the frequency of the wave is
5 Hz
16 Hz
20 Hz
25 Hz
The velocity of sound in any gas depends upon.
Wavelength of sound only
Density and elasticity of gas
Intensity of sound waves only
Amplitude and frequency of sound
