Source and Listener Moving in Different Lines
Trending Questions
Q. The transverse displacement of a string fixed at both ends is given by
y=0.06 sin(2πx3)cos(120πt)
where x and y are in metres and t is in seconds. The length of the string is 1.5 m and its mass is 3.0×10−2 kg. What is the tension in the string?
y=0.06 sin(2πx3)cos(120πt)
where x and y are in metres and t is in seconds. The length of the string is 1.5 m and its mass is 3.0×10−2 kg. What is the tension in the string?
- 648 N
- 724 N
- 832 N
- 980 N
Q. A stationary observer receives a sound from a sound of frequency v0 moving with a constant velocity vs=30 m/s. The apparent frequency varies with time as shown in figure. Velocity of sound v = 300 m/s. Then which of the following is incorrect?
- The minimum value of apparent frequency is 889 Hz.
- The natural frequency of source is 1000 Hz.
- The frequency-time curve corresponds to a source moving at an angle to the stationary observer.
- The maximum value of apparent frequency is 1111 Hz.
Q. Source and observer start moving simultaneously along x and y-axis, respectively. The speed of source is twice the speed of observer, V0. If the ratio of observed frequency to the frequency of the source is 0.75, find the velocity of sound.
- 11√5V0
- 17√5V0
- 16√5V0
- 19√5V0
Q.
A boy riding on his bike is going towards east at a speed of 4√2ms−1. At a certain point he produces a sound pulse of frequency 1650 Hz that travels in air at a speed of 334ms−1. A second boy stands on the ground 45∘C south of east from him. Find the frequency of the pulse as received by the second boy.
- 1670
- 1640
- 1650
- None of these
Q. Two cars are moving on two perpendicular roads towards a crossing with uniform speeds of 72 km/h and 36 km/h. If second car blows horn of frequency 280 Hz, then the frequency of horn heard by the driver of first car when the line joining the cars makes angle of 45∘ with the roads, will be (velocity of sound is 330 m/s)
- 321 Hz
- 298 Hz
- 289 Hz
- 280 Hz
Q. A stationary observer receives a sound from a sound of frequency v0 moving with a constant velocity vs=30 m/s. The apparent frequency varies with time as shown in figure. Velocity of sound v = 300 m/s. Then which of the following is incorrect?
- The minimum value of apparent frequency is 889 Hz.
- The natural frequency of source is 1000 Hz.
- The frequency-time curve corresponds to a source moving at an angle to the stationary observer.
- The maximum value of apparent frequency is 1111 Hz.
Q. Two cars are moving on two perpendicular roads towards a crossing with uniform speeds of 72 km/h and 36 km/h. If second car blows horn of frequency 280 Hz, then the frequency of horn heard by the driver of first car when the line joining the cars makes angle of 45∘ with the roads, will be (velocity of sound is 330 m/s)
- 321 Hz
- 298 Hz
- 289 Hz
- 280 Hz
Q. A train is moving in an elliptical orbit in anticlockwise sense with a speed of 110 m/s. Guard is also moving in the given direction with same speed as that of train. The ratio of the length of major and minor axes is 43. Driver blows a whistle of 1900 Hz at P, which is received by guard at S. The frequency received by guard is (velocity of sound v = 330 m/s)
- 1900 Hz
- 1800 Hz
- 2000 Hz
- 1500 Hz