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
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 10cm 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
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
A standing wave is represented by y = a sin (100t) cos (0.01)x, is in metre. velocity of wave is
104m/s
1 m/s
10-4 m/s
Not derivable from above data
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
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
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
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 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)
