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 [...]
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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 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. [...]
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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 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 [...]
The graph shows a wave at t=0 travelling to the right with a velocity of 4m/s. The equation that best represents the wave is
28
Oct
The graph shows a wave at t=0 travelling to the right with a velocity of 4m/s. The equation that best represents the wave is The graph shows a wave at t=0 travelling to the right with a velocity of 4m/s. The equation that best represents the wave is October 28, 2020 Category: Cengage JEE Mains [...]
The figure below is a representation of a simple harmonic progressive in the negative X-axis, at a given instant. The direction of the velocity of the particle at stage P in the figure is best represent by the arrow.
28
Oct
The figure below is a representation of a simple harmonic progressive in the negative X-axis, at a given instant. The direction of the velocity of the particle at stage P in the figure is best represent by the arrow. at a given instant. The direction of the velocity of the particle at stage P in [...]