Chapter 16 – Waves and Acoustics
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 16 - Waves and Acoustics
When a source moves away from a stationary observer, the frequency is 6/7 times the original frequency. Given: speed of sound =330 m/s . The speed of the source is
29
Oct
When a source moves away from a stationary observer, the frequency is 6/7 times the original frequency. Given: speed of sound =330 m/s . The speed of the source is the frequency is 6/7 times the original frequency. Given: speed of sound =330 m/s. The speed of the source is When a source moves away [...]
In a sports meet the timing of a 200 m straight dash is recorded at the finish point by starting an accurate stop watch on hearing the sound of starting gun fired at the starting point. The time recorded will be more accurate
29
Oct
In a sports meet the timing of a 200 m straight dash is recorded at the finish point by starting an accurate stop watch on hearing the sound of starting gun fired at the starting point. The time recorded will be more accurate October 29, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , [...]
A stationary observer receives a sound from a sound of frequency v0 moving with a constant velocity v1 = 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?
29
Oct
A stationary observer receives a sound from a sound of frequency v0 moving with a constant velocity v1 = 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? October 29, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , [...]
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 4/3. 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)
29
Oct
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 4/3. Driver blows a whistle of 1900 Hz at P, which is [...]
A boy is walking away from a well at a speed of 1.0m/s in a direction at right angles to the wall. As he walks, he below a whistle steadily. An observer towards whom the boy is walking hears 4.0 beats per second. If the speed of sound is 340m/s , what is the frequency of the whistle is
29
Oct
A boy is walking away from a well at a speed of 1.0m/s in a direction at right angles to the wall. As he walks, he below a whistle steadily. An observer towards whom the boy is walking hears 4.0 beats per second. If the speed of sound is 340m/s , what is the frequency [...]
A sound wave of frequency n travels horizontally to the right with speed with speed c. It is reflected from a broad wall moving to the left with speed v. The number of beats heard by a stationary observer to the left of the wall is
29
Oct
A sound wave of frequency n travels horizontally to the right with speed with speed c. It is reflected from a broad wall moving to the left with speed v. The number of beats heard by a stationary observer to the left of the wall is a person standing at a point O on a [...]
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a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. If the original frequency is 640Hz ,
A source of sound is travelling at 100/3 m/s along a road ,
then the value of f is (given velocity of sound = 340m/s) ,
towards a point A. When the source is 3m away from A ,
A source of sound is travelling with a velocity of 30 m/s towards a stationary observer. If actual frequency of source is 1000 Hz and the wind is blowing with velocity 20ms in a direction at 60^∘C with the direction of motion of source, then the apparent frequency heard by observer is (speed of sound is 340 m/s)
29
Oct
A source of sound is travelling with a velocity of 30 m/s towards a stationary observer. If actual frequency of source is 1000 Hz and the wind is blowing with velocity 20ms in a direction at 60^∘C with the direction of motion of source, then the apparent frequency heard by observer is (speed of sound [...]
Tags:
a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. If the original frequency is 640Hz ,
A source of sound is travelling at 100/3 m/s along a road ,
then the value of f is (given velocity of sound = 340m/s) ,
towards a point A. When the source is 3m away from A ,
A source of sound is travelling at 100/3 m/s along a road, towards a point A. When the source is 3m away from A, a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. If the original frequency is 640Hz, then the value of f is (given velocity of sound = 340m/s)
29
Oct
A source of sound is travelling at 100/3 m/s along a road, towards a point A. When the source is 3m away from A, a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. [...]
Tags:
a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. If the original frequency is 640Hz ,
A source of sound is travelling at 100/3 m/s along a road ,
then the value of f is (given velocity of sound = 340m/s) ,
towards a point A. When the source is 3m away from A ,
A source of sound produces waves of wavelength 60 cm when it is stationary if the speed of sound in air is 320 m/s and source moves with speed 20 m/s, the wavelength of sound in the forward direction will be nearest to
29
Oct
A source of sound produces waves of wavelength 60 cm when it is stationary if the speed of sound in air is 320 m/s and source moves with speed 20 m/s, the wavelength of sound in the forward direction will be nearest to A source of sound produces waves of wavelength 60 cm when it [...]
An engine running at speed v/10 sounds a whistle of frequency 600 Hz. A passenger in a train coming from the opposite side at speed of v/15 experiences this whistle to be of frequency f. If v is speed of sound in air and there is no wind. F is nearest to
28
Oct
An engine running at speed v/10 sounds a whistle of frequency 600 Hz. A passenger in a train coming from the opposite side at speed of v/15 experiences this whistle to be of frequency f. If v is speed of sound in air and there is no wind. F is nearest to The graph shows [...]