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
What is the effect of humidity on sound waves when humidity increases?
Speed of sound wave increases
Speed of sound decreases
Speed of sound waves remains same
Speed of sound waves becomes zero.
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
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
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
Which of the following equation represents a wave?
y = a sin ωt
y = a cos kx
y = a sin (ωt - bx + c)
y = a sin (ωt - kx)
A stretched string resonates with tuning fork frequency 512 Hz when length of the string is 0.5m. The length of the string required to vibrate resonantly with a tuning fork of frequency 256 Hz would be.
0.25m
0.5m
1m
2m
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
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
The frequency of sinusoidal wave, 0.40 cos (2000t + 0.80) would be
1000π Hz
2000 Hz
20 Hz
1000/π Hz
