1.The wave equation is \[Y = 0.30 \sin\left(314 t- 1.57x\right)\]
where t, x and y are in second, meter and
centimeter respectively. The speed of the wave is
a) 100 m/s
b) 200 m/s
c) 300 m/s
d) 400 m/s
Explanation:
2. Equation of the progressive wave is given by : \[Y = a \sin \pi\left(40 t- x\right)\] where a and x are in metre and
t in second. The velocity of the wave is
a) 80 m/s
b) 20 m/s
c) 40 m/s
d) 10 m/s
Explanation:
3.Progressive wave of sound is represented by \[Y = a \sin \left(400\pi t-\pi x/6.85\right)\] where x is in m and t is
in sec. Frequency of the wave will be
a) 200 Hz
b) 400 Hz
c) 500 Hz
d) 600 Hz
Explanation:
4. Two waves of frequencies 20 Hz and 30 Hz.
Travels out from a common point. The phase
difference between them after 0.6 sec is
a) Zero
b) \[\frac{\pi}{2}\]
c) \[\pi\]
d) \[\frac{3\pi}{4}\]
Explanation:
5. The phase difference between two points
separated by 0.8 m in a wave of frequency 120 Hz
is \[90^{\circ}\] . Then the velocity of wave will be
a)192 m/s
b) 360 m/s
c) 710 m/s
d) 384 m/s
Explanation:
6. The equation of progressive wave is \[Y = 0.2 \sin 2\pi\left(\frac{t}{0.01}-\frac{x}{0.3}\right)\] , where x and y are in
metre and t is in second. The velocity of
propagation of the wave is
a) 30 m/s
b) 40 m/s
c) 300 m/s
d) 400 m/s
Explanation:
7. If the equation of transverse wave is \[Y =5 \sin 2\pi\left(\frac{t}{0.04}-\frac{x}{40}\right)\] , where distance is in cm and
time in second, then the wavelength of the wave
is
a) 60 cm
b) 40 cm
c) 35 cm
d) 25 cm
Explanation:
8.A simple harmonic progressive wave is represented by
the equation : \[Y =8 \sin 2\pi\left(0.1x-2t\right)\] where x and y
are in cm and t is in seconds. At any instant the
phase difference between two particles separated
by 2.0 cm in the x-direction is
a)\[18^{\circ}\]
b) \[36^{\circ}\]
c) \[54^{\circ}\]
d) \[72^{\circ}\]
Explanation:
9.The intensity of a progressing plane wave in lossfree
medium is
a) Directly proportional to the square of
amplitude of the wave
b) Directly proportional to the velocity of the
wave
c) Directly proportional to the square of
frequency of the wave
d) All of the Above
Explanation:
10.The equation of progressive wave is \[Y =a \sin \left(200 t-x\right)\] . where x is in meter and t is in
second. The velocity of wave is
a) 200 m/sec
b) 100 m/sec
c) 50 m/sec
d) None of these
Explanation:
