Chapter 10 – Wave Optics
Is Huygen’s principle valid for longitudinal sound waves?
19
Nov
Is Huygen’s principle valid for longitudinal sound waves? Is Huygen's principle valid for longitudinal sound waves? November 19, 2020 Category: Chapter 10 - Wave Optics , NCERT Exemplar Class 12 , Physics ,
A SONAR system fixed in a submarine operates at a frequency 40.0kHz. An enemy submarine moves towards the SONAR with a speed of 360 kmh^−1. What is the frequency of sound reflected by the submarine ? Take the speed of sound in water to be 1450 ms^−1.
13
Nov
A SONAR system fixed in a submarine operates at a frequency 40.0kHz. An enemy submarine moves towards the SONAR with a speed of 360 kmh^−1. What is the frequency of sound reflected by the submarine ? Take the speed of sound in water to be 1450 ms^−1. A string of mass 2.50 kg is under [...]
One end of a long string of linear mass density 8.0 ×10^−3 kg/m is connected to an electrically driven tuning fork of frequency 256 Hz. The other end passes over a pulley and is tied to a pan containing a mass of 90 kg. The pulley end absorbs all the incoming energy so that reflected waves at this end have negligible amplitude. At t = 0, the left end (fork end) of the string x = 0 has zero transverse displacement (y = 0) and is moving along positive y-direction. The amplitude of the wave is 5.0 cm. Write down the transverse displacement y as function of x and t that describes the wave on the string :
13
Nov
One end of a long string of linear mass density 8.0 ×10^−3 kg/m is connected to an electrically driven tuning fork of frequency 256 Hz. The other end passes over a pulley and is tied to a pan containing a mass of 90 kg. The pulley end absorbs all the incoming energy so that reflected [...]
A travelling harmonic wave on a string is described by y(x,t) = 7.5sin(0.0050x + 12t + π/4) (a) what are the displacement and velocity of oscillation of a point at x = 1cm, and t = 1s ? Is this velocity equal to the velocity of wave propagation ? (b) Locate the point of the string which have the same transverse displacement and velocity as x=1cm point at t=2s,5s and 11s.
13
Nov
A travelling harmonic wave on a string is described by y(x,t) = 7.5sin(0.0050x + 12t + π/4) (a) what are the displacement and velocity of oscillation of a point at x = 1cm, and t = 1s ? Is this velocity equal to the velocity of wave propagation ? (b) Locate the point of the [...]
Tags:
5s and 11s. ,
A travelling harmonic wave on a string is described by y(x ,
and t = 1s ? Is this velocity equal to the velocity of wave propagation ? (b) Locate the point of the string which have the same transverse displacement and velocity as x=1cm point at t=2s ,
t) = 7.5sin(0.0050x + 12t + π/4) (a) what are the displacement and velocity of oscillation of a point at x = 1cm ,
A train, standing in a station yard, blows a whistle of frequency 400 Hz in still air. The wind starts blowing in the direction from the yard to the station with a speed of 10 m/s . What are the frequency, wavelength, and speed of sound for an observer standing on the station’s platform ? Is the situation exactly identical to the case when the air is still and the observer runs towards the yard at a speed of 10 m/s ? The speed of sound in still air can be taken as 340 m/s
13
Nov
A train, standing in a station yard, blows a whistle of frequency 400 Hz in still air. The wind starts blowing in the direction from the yard to the station with a speed of 10 m/s . What are the frequency, wavelength, and speed of sound for an observer standing on the station’s platform ? [...]
Tags:
A string of mass 2.50 kg is under a tension of 200 N. The length of the stretched string is 20.0 m. If the transverse jerk is struck at one end of the string ,
A train ,
blows a whistle of frequency 400 Hz in still air. The wind starts blowing in the direction from the yard to the station with a speed of 10 m/s . What are the frequency ,
how long does he disturbance take to reach the other end ? ,
standing in a station yard ,
wavelength ,
A train standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air. (i) What is the frequency of the whistle for a platform observer when the train (a) approaches the platform with a speed of 10 m/s (b) recedes from the platform with a speed of 10 m/s ? (ii) what is the speed of sound in each case? The speed of sound in still air can be taken as 340 m/s
13
Nov
A train standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air. (i) What is the frequency of the whistle for a platform observer when the train (a) approaches the platform with a speed of 10 m/s (b) recedes from the platform with a speed of [...]
The difference in frequency is the number of beats. If tension in the wire is increased the frequency is also increased and vice – versa.
13
Nov
The difference in frequency is the number of beats. If tension in the wire is increased the frequency is also increased and vice – versa. The difference in frequency is the number of beats. If tension in the wire is increased the frequency is also increased and vice - versa. November 13, 2020 Category: Chapter [...]
A pipe 20 cm long is closed at one end. Which harmonic mode of the pipe is resonantly excited by a 430 Hz source ? Will the same source be in resonance with the pipe if both ends are open ? (speed of sound in air is 340 m/s)
13
Nov
A pipe 20 cm long is closed at one end. Which harmonic mode of the pipe is resonantly excited by a 430 Hz source ? Will the same source be in resonance with the pipe if both ends are open ? (speed of sound in air is 340 m/s) A string of mass 2.50 kg [...]
A steel rod 100 cm long is clamped at its middle. The fundamental frequency of longitudinal vibrations of the rod are given to be 2.53 kHz. What is the speed of sound in steel ?
13
Nov
A steel rod 100 cm long is clamped at its middle. The fundamental frequency of longitudinal vibrations of the rod are given to be 2.53 kHz. What is the speed of sound in steel ? A steel rod 100 cm long is clamped at its middle. The fundamental frequency of longitudinal vibrations of the rod [...]
A metre-long tube open at one end, with a movable piston at the other end, shows resonance with a fixed frequency source (a tuning fork of frequency 340 Hz ) when the tube length is 25.5 cm or 79.3 cm. Estimate the speed of sound in air at the temperature of the experiment. The edge effect may be neglected.
13
Nov
A metre-long tube open at one end, with a movable piston at the other end, shows resonance with a fixed frequency source (a tuning fork of frequency 340 Hz ) when the tube length is 25.5 cm or 79.3 cm. Estimate the speed of sound in air at the temperature of the experiment. The edge [...]
Tags:
A metre-long tube open at one end ,
A string of mass 2.50 kg is under a tension of 200 N. The length of the stretched string is 20.0 m. If the transverse jerk is struck at one end of the string ,
how long does he disturbance take to reach the other end ? ,
with a movable piston at the other end ,