JEE Mains Physics 2002-2019 Solved Video Solutions
A train is moving on a straight track with speed 20ms^−1. It is blowing its whistle at the frequency of 1000Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound =320ms^−1) close to :
07
Nov
A train is moving on a straight track with speed 20ms^−1. It is blowing its whistle at the frequency of 1000Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound =320ms^−1) close to : A heavy ball of mass M is [...]
An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10 GHz. What is the frequency of the microwave measured by the observer? (speed of light =3×10^8 ms^−1 )
07
Nov
An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10 GHz. What is the frequency of the microwave measured by the observer? (speed of light =3×10^8 ms^−1 ) A heavy ball of mass M is suspended from the ceiling of a car by a light [...]
A granite rod of 60 cm length is clamped at its middle point and is set into longitudinal vibrations. The density of granite is 2.7×10^3 kg/m^3 and its Young’s modulus is 9.27×10^10 Pa. What will be the fundamental frequency of the longitudinal vibrations ?
07
Nov
A granite rod of 60 cm length is clamped at its middle point and is set into longitudinal vibrations. The density of granite is 2.7×10^3 kg/m^3 and its Young’s modulus is 9.27×10^10 Pa. What will be the fundamental frequency of the longitudinal vibrations ? A heavy ball of mass M is suspended from the ceiling [...]
A resonance tube is old and has jagged end. It is still used in the laboratory to determine velocity of sound in air. A tuning fork of frequency 512Hz produces first resonance when the tube is filled with water to a mark 11cm below a reference mark, near the open end of the tube. The experiment is repeated with another fork of frequency 256Hz which produces first resonance when water reaches a mark 27cm below the reference mark. The velocity of sound in air, obtained in the experiment, is close to:
07
Nov
A resonance tube is old and has jagged end. It is still used in the laboratory to determine velocity of sound in air. A tuning fork of frequency 512Hz produces first resonance when the tube is filled with water to a mark 11cm below a reference mark, near the open end of the tube. The [...]
A travelling harmonic wave is represented by the equation y(x,t) = 10^-3 sin (50t + 2x) , where x and y are in meter and t is in seconds. Which of the following is a correct statement about the wave ?
07
Nov
A travelling harmonic wave is represented by the equation y(x,t) = 10^-3 sin (50t + 2x) , where x and y are in meter and t is in seconds. Which of the following is a correct statement about the wave ? A travelling harmonic wave is represented by the equation y(x t) = 10^-3 sin [...]
A person standing on an open ground hears the sound of a jet aeroplane , coming from north at an angle 60^∘ with ground level ,But he finds the aeroplane right vertically above his position , if V is the speed of sound , speed of the plane is :
07
Nov
A person standing on an open ground hears the sound of a jet aeroplane , coming from north at an angle 60^∘ with ground level ,But he finds the aeroplane right vertically above his position , if V is the speed of sound , speed of the plane is : A person standing on an [...]
Equation of travelling wave on a stretched string of linear density 5 g/m is y = 0.03 sin(450 t – 9x) where distance and time are measured is SI units. The tension in the string is :
07
Nov
Equation of travelling wave on a stretched string of linear density 5 g/m is y = 0.03 sin(450 t – 9x) where distance and time are measured is SI units. The tension in the string is : Equation of travelling wave on a stretched string of linear density 5 g/m is y = 0.03 sin(450 [...]
A closed organ pipe has a fundamental frequency of 1.5 kHz. The number of overtones that can be distinctly heard by a person with this organ pipe will be : (Assume that the highest frequency a person can hear is 20,000 Hz)
07
Nov
A closed organ pipe has a fundamental frequency of 1.5 kHz. The number of overtones that can be distinctly heard by a person with this organ pipe will be : (Assume that the highest frequency a person can hear is 20,000 Hz) A heavy ball of mass M is suspended from the ceiling of a [...]
A string of length 1 m and mass 5 g is fixed at both ends. The tension in the string is 8.0 N. The siring is set into vibration using an external vibrator of frequency 100 Hz. The separation between successive nodes on the string is close to
07
Nov
A string of length 1 m and mass 5 g is fixed at both ends. The tension in the string is 8.0 N. The siring is set into vibration using an external vibrator of frequency 100 Hz. The separation between successive nodes on the string is close to A heavy ball of mass M is [...]
A heavy ball of mass M is suspended from the ceiling of a car by a light string of mass m(m
07
Nov
A heavy ball of mass M is suspended from the ceiling of a car by a light string of mass m(m A heavy ball of mass M is suspended from the ceiling of a car by a light string of mass m(m November 7, 2020 Category: Chapter 10 - Oscillation and Waves , JEE Mains [...]