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A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB intensity sound ? [Given reference intensity of sound as 10^−12W/m^2
07
Nov
A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB intensity sound ? [Given reference intensity of sound as 10^−12W/m^2 A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB intensity sound ? [Given reference [...]
A whistle emitting a sound of frequency 440 Hz is tied to a string of 1.5 m length and rotated with an angular velocity of 20 rad/s in the horizontal plane. Calculate the range of
07
Nov
A whistle emitting a sound of frequency 440 Hz is tied to a string of 1.5 m length and rotated with an angular velocity of 20 rad/s in the horizontal plane. Calculate the range of A whistle emitting a sound of frequency 440 Hz is tied to a string of 1.5 m length and rotated [...]
Three initially uncharged capacitors are arranged with batteries as shown in figure. Find the charge on each capacitor.
07
Nov
Three initially uncharged capacitors are arranged with batteries as shown in figure. Find the charge on each capacitor. Three initially uncharged capacitors are arranged with batteries as shown in figure. Find the charge on each capacitor. November 7, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A bat flies perpendicularly towards a wall with a speed of 6 m/s, emitting sound of frequency 450 kHz. What is the frequency of the wave reflected from the wall that it will hear?
07
Nov
A bat flies perpendicularly towards a wall with a speed of 6 m/s, emitting sound of frequency 450 kHz. What is the frequency of the wave reflected from the wall that it will hear? A bat flies perpendicularly towards a wall with a speed of 6 m/s emitting sound of frequency 450 kHz. What is [...]
A tuning fork of frequency 480Hz is used in an experiment for measuring speed of sound (v) in air by resonance tube method. resonance is observed to occur at two successive lengths of the air column, l1 = 30cm and l2 = 70cm. Then v is equal to:
07
Nov
A tuning fork of frequency 480Hz is used in an experiment for measuring speed of sound (v) in air by resonance tube method. resonance is observed to occur at two successive lengths of the air column, l1 = 30cm and l2 = 70cm. Then v is equal to: A tuning fork of frequency 480Hz is [...]
The ratio of the apparent frequencies of a car when approaching and receding a stationary observer is 11 : 9. What is the speed of the car, if the velocity of sound in air is 300 m/s ?
07
Nov
The ratio of the apparent frequencies of a car when approaching and receding a stationary observer is 11 : 9. What is the speed of the car, if the velocity of sound in air is 300 m/s ? if the velocity of sound in air is 300 m/s ? The ratio of the apparent frequencies [...]
A railroad train is travelling at 30 m/s in still air. The frequency of the note emitted by locomotive whistle is 500 Hz. What is the frequency of the sound waves heard by a stationary listener
07
Nov
A railroad train is travelling at 30 m/s in still air. The frequency of the note emitted by locomotive whistle is 500 Hz. What is the frequency of the sound waves heard by a stationary listener A railroad train is travelling at 30 m/s in still air. The frequency of the note emitted by locomotive [...]
A source moves away from an observer with a certain speed, and the ratio of actual to the apparent frequency as heard by the observer in n. If the two approach each other with the same
07
Nov
A source moves away from an observer with a certain speed, and the ratio of actual to the apparent frequency as heard by the observer in n. If the two approach each other with the same A source moves away from an observer with a certain speed and the ratio of actual to the apparent [...]
Two sources of sound S1 and S2 produce sound waves of same frequency 660 Hz. A listener is moving from source S1 towards S2 with a constant speed um/s and he hears 10 beats/s. The velocity of sound is 330 m/s. Then, u equals:
07
Nov
Two sources of sound S1 and S2 produce sound waves of same frequency 660 Hz. A listener is moving from source S1 towards S2 with a constant speed um/s and he hears 10 beats/s. The velocity of sound is 330 m/s. Then, u equals: A string 2.0m long and fixed at its ends is driven [...]
A progressive wave travelling along the positive x-direction is represented by y(x,t)=Asin(kx−ωt+ϕ). Its snapshot at t=0 is given in the figure. For this wave, the phase is:
07
Nov
A progressive wave travelling along the positive x-direction is represented by y(x,t)=Asin(kx−ωt+ϕ). Its snapshot at t=0 is given in the figure. For this wave, the phase is: A progressive wave travelling along the positive x-direction is represented by y(x t)=Asin(kx−ωt+ϕ). Its snapshot at t=0 is given in the figure. For this wave the phase is: [...]