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General
Easy
Question
A transverse wave is passing through a light string shown in the figure. The equation of wave is y null The area of cross-section of string is A and density is r . The hanging mass is
- Aω
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The correct answer is: Aω
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Physics-
An open pipe resonates to a frequency f1 and a closed pipe resonates to a frequency f2. If they are joined together to form a longer tube, then it will resonate to a frequency of (neglect end corrections)
An open pipe resonates to a frequency f1 and a closed pipe resonates to a frequency f2. If they are joined together to form a longer tube, then it will resonate to a frequency of (neglect end corrections)
Physics-General
Physics-
A closed organ pipe has length l. The air in it is vibrating in 3rd overtone with a maximum amplitude of A. Find the amplitude at a distance of l /14 from closed end of the pipe
A closed organ pipe has length l. The air in it is vibrating in 3rd overtone with a maximum amplitude of A. Find the amplitude at a distance of l /14 from closed end of the pipe
Physics-General
Physics-
The difference between apparent freqencies of a source of sound as percieved by a stationary observer during its approach and recession is 2% of the actual freqency. The speed of source is (V = 340m/sec.)
The difference between apparent freqencies of a source of sound as percieved by a stationary observer during its approach and recession is 2% of the actual freqency. The speed of source is (V = 340m/sec.)
Physics-General
Physics-
The fundamental frequency of a sonometer wire of length 
is fo. A bridge is now introduced at a distance of Δ from the centre of the wire ( 
<<). The number of beats heard per second if both sides of the bridge are set to vibrate in their fundamental mode is
The fundamental frequency of a sonometer wire of length is fo. A bridge is now introduced at a distance of Δ from the centre of the wire ( <<). The number of beats heard per second if both sides of the bridge are set to vibrate in their fundamental mode is
Physics-General
Physics-
A source S emitting sound of frequency 300Hz is fixed on block A which is attached to the free end of a spring SA as shown in figure. The dectector D fixed on block B attached to free end of spring SB detects this sound. The blocks A and B are simultaneously displaced towards each other through a distance of 1.0m and then left to vibrate. The maximum and minimum frequencies of sound detected by D, if the vibrational frequency of each block is 2Hz are (Velocity of sound v = 340m/s)
A source S emitting sound of frequency 300Hz is fixed on block A which is attached to the free end of a spring SA as shown in figure. The dectector D fixed on block B attached to free end of spring SB detects this sound. The blocks A and B are simultaneously displaced towards each other through a distance of 1.0m and then left to vibrate. The maximum and minimum frequencies of sound detected by D, if the vibrational frequency of each block is 2Hz are (Velocity of sound v = 340m/s)
Physics-General
Physics-
Two stereo speakers are separated by a distance of 2.4 m. A person stands at a distance of 3.2 m as shown directly in front of one of the speakers. The frequencies in audible range for which the listener will hear a minimum sound intensity are (Speed of the sound in air is 320 ms-1 and n is order of minimum)
Two stereo speakers are separated by a distance of 2.4 m. A person stands at a distance of 3.2 m as shown directly in front of one of the speakers. The frequencies in audible range for which the listener will hear a minimum sound intensity are (Speed of the sound in air is 320 ms-1 and n is order of minimum)
Physics-General
Physics-
A string of length l along x-axis is fixed at both ends and is vibrating in second harmonic. If at t = 0, y = 2.5mm for incident wave, the equation of standing wave is ( T is tension and 
is linear density)
A string of length l along x-axis is fixed at both ends and is vibrating in second harmonic. If at t = 0, y = 2.5mm for incident wave, the equation of standing wave is ( T is tension and is linear density)
Physics-General
Physics-
In the given arrangement, if hanging mass will be changed by 4%, then percentage change in the wave speed in string will be
In the given arrangement, if hanging mass will be changed by 4%, then percentage change in the wave speed in string will be
Physics-General
Physics-
The vibrating of four air columns are represented in the figure. The ratio of frequencies 
The vibrating of four air columns are represented in the figure. The ratio of frequencies
Physics-General
Physics-
A pressure of P causes a decrease in volume of water by a fraction ‘Q’. The speed of sound in water is (in CGS)
A pressure of P causes a decrease in volume of water by a fraction ‘Q’. The speed of sound in water is (in CGS)
Physics-General
Physics-
A source of sound produces waves of wave length 48cm. This source is moving towards north with speed V/4 where V is speed of sound. The apparant wavelength of the waves radius ‘r’ so that a maximum of sound is heard at detector is
A source of sound produces waves of wave length 48cm. This source is moving towards north with speed V/4 where V is speed of sound. The apparant wavelength of the waves radius ‘r’ so that a maximum of sound is heard at detector is
Physics-General
Physics-
A closed pipe is suddenly opened and changed to an open pipe of same length. The funda-mental frequency of the resulting open pipe is less than that of 3rd hoarmonic of the ear-lier closed pipe by 55Hz. Then, the value of fundamental frequency of the closed pipe is
A closed pipe is suddenly opened and changed to an open pipe of same length. The funda-mental frequency of the resulting open pipe is less than that of 3rd hoarmonic of the ear-lier closed pipe by 55Hz. Then, the value of fundamental frequency of the closed pipe is
Physics-General
Physics-
A ‘pop’ gun consists a tube 25cm long closed at one end by a cork and the other end by a tightly fitted piston as shown. The piston is pushed slowly in. When the pressure rises to one and half times the atmospheric pressure, the cork is violently blow out. The frequency of the‘pop’caused by its ejection is ( V = 340m/s)
A ‘pop’ gun consists a tube 25cm long closed at one end by a cork and the other end by a tightly fitted piston as shown. The piston is pushed slowly in. When the pressure rises to one and half times the atmospheric pressure, the cork is violently blow out. The frequency of the‘pop’caused by its ejection is ( V = 340m/s)
Physics-General
Physics-
A source of sound is travelling at null 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 ‘n ’. The distance of O from A at that time is 4m. If the original frequency is 640 Hz, then the value of n is (given velocity of sound null
A source of sound is travelling at null 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 ‘n ’. The distance of O from A at that time is 4m. If the original frequency is 640 Hz, then the value of n is (given velocity of sound null
Physics-General
Physics-
A long rubber tube having mass 0.9kg is fastened to a fixed support and the free end of the tube is attached to a chord which passes over a pulley and supports an object, with a mass of 5kg as shown in figure. If the tube is struck by a transverse blow at one end, the time required for the pulse to reach the other end is
A long rubber tube having mass 0.9kg is fastened to a fixed support and the free end of the tube is attached to a chord which passes over a pulley and supports an object, with a mass of 5kg as shown in figure. If the tube is struck by a transverse blow at one end, the time required for the pulse to reach the other end is
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