Transverse & Longitudinal Waves

Q. 43. A train blowing its whistle moves with constantspeed on a straight track towards observer andthen crosses him. If the ratio of difference betweenthe actual and apparent frequencies be 3: 2 in thetwo cases, then the speed of train is \lbrack v is speedof sound\rbrack

Q. 128.The frequency of the whistle of an engine appears to drop to 2/3rd of its actual value when it passes a stationary observer. Velocity of sound in air is 330m/sec then the speed of engine is

Q.

Two sound sources fixed at a given distance apart are emitting sound each of wavelength λ. A Listener moves with a velocity v₀ along the line joining the two sources , the number of beats heard by him per second is

1. v₀/2λ

2. 4v₀/λ

3. 2v₀/λ

4. v₀/3λ

Q. A wave moving in a gas
(a) must be longitudinal
(b) may be longitudinal
(c) must transverse
(d) may be transverse.

Q. A transverse wave travels along the $z-$ axis. The particles of the medium must oscillate

1. along the $z-$ axis
2. in the $x-z$ plane
3. in the $y-z$ plane
4. in the $x-y$ plane

Q. A fixed source of sound emitting a certain frequency appears as f_a when the observer is approaching the source with speed v and frequency f_r when the observer recedes from the source with same speed.The frequency of the source is how much

Q. You are walking along a seashore and a mild wind is blowing. Is the motion of air a wave motion?

1. Yes
2. No
3. Can't say
4. Depends on the direction of wind

Q. Light waves travel in vacuum along the X-axis. Which of the following may represent the wave fronts?
(a) x = c
(b) y = c
(c) z = c
(d) x + y + z = c

Q. A transverse wave travels along the Z-axis, the particles of the medium must move

1. along the Z-axis
2. along the X-axis
3. along the Y-axis
4. in the X-Y plane

Q. Which of these will travel in a wave along with it?

1. particles
2. energy
3. both
4. none of these

Q. A mechanical wave propagates in a medium along the X-axis. The particles of the medium
(a) must move on the X-axis
(b) must move on the Y-axis
(c) may move on the X-axis
(d) may move on the Y-axis.

Q.

Doing the Mexican wave' in a sports stadium is when people stand and sit in a continuuous order. So as to make a wave [as looked from outside] people don't leave their respective seat and just move up and down. The wave, transverse in nature appears to be moving. Is this example of a real physical wave?

1. True
2. False

Q. With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the direction of propagation are:

1. Energy , momentum and mass
2. Energy
3. Energy and mass
4. Energy and linear momentum

Q. A transverse wave travels along the Z-axis, the particles of the medium must move

1. along the Z-axis
2. along the X-axis
3. along the Y-axis
4. in the X-Y plane

Q.

A wave going in a solid

1. must be longitudinal

2. may be longitudinal

3. must be transverse

4. may be transverse

Q. A tube open at both ends has fundamental frequency of 160 Hz. The velocity of sound in air is 360 m/s. What is end correction of length of tube is 1.1 m. (1) 1.5 cm (3) 2.5 cm (2)1.25 cm✓ (4)3.0 cm