A wave of frequency 100 Hz is sent along a string towards a fixed end. When this wave travels back after reflection, a node is formed at a distance of 10 cm from the fixed end of the string. The speed of incident ( and reflected) wave are
5 m/s
10 m/s
20 m/s
40 m/s
A standing wave is represented by y = asin (100t) cos(0.01)x, where y and a are in millimetre, t in second and x is in metre. Velocity of wave is
104 m/s
1 m/s
10-4 m/s
The speed of a wave in a medium is 760 m/s. If 3600 waves are passing through a point in the medium in 2 min, then their wavelength is
13.8 m
25.3 m
41.5 m
57.2 m
The transverse wave represented by the equation has
amplitude = 4π
speed of propagation = 5
The frequency of sinusoidal wave, 0.40 cos (2000t + 0.80) would be
1000π Hz
2000 Hz
20 Hz
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)
If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will
increase by a factor of 2
decrease by a factor of 2
decrease by a factor of 4
remains unchanged
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
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
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 1.6 π. The frequency of this wave is
165 Hz
150 Hz
660 Hz
330 Hz
