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Waves

36 questions · Physics · JEE Advanced
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Waves

36 questions · Physics · JEE Advanced

  1. An audio transmitter (T) and a receiver (R) are hung vertically from two identical massless strings of length 8 m with their pivots well separated along the X axis. They are pulled from the equilibrium position in opposite directions… Includes diagram2025 · Shift 2 · Q48 · Numerical
  2. Two uniform strings of mass per unit length μ and 4μ, and length L and 2L, respectively, are joined at point O, and tied at two fixed ends P and Q, as shown in the figure. The strings are… Includes diagram2024 · Shift 1 · Q40 · Multiple correct
  3. A source (S) of sound has frequency 240 Hz. When the observer (O) and the source move towards each other at a speed v with respect to the ground (as shown in Case 1 in the figure), the observer measures the frequency of the… Includes diagram2024 · Shift 1 · Q45 · Numerical
  4. A string of length 1 m and mass 2×10−5 kg is under tension T. When the string vibrates, two successive harmonics are found to occur at frequencies 750 Hz and 1000 Hz. The value of…2023 · Shift 2 · Q44 · Numerical
  5. S1​ and S2​ are two identical sound sources of frequency 656 Hz. The source S1​ is located at O and S2​ moves anti-clockwise with a uniform speed 42​ m s−1 on a circular path around… Includes diagram2023 · Shift 2 · Q48 · Numerical
  6. S1​ and S2​ are two identical sound sources of frequency 656 Hz. The source S1​ is located at O and S2​ moves anti-clockwise with a uniform speed 42​ m s−1 on a circular path around… Includes diagram2023 · Shift 2 · Q49 · Numerical
  7. A source, approaching with speed u towards the open end of a stationary pipe of length L, is emitting a sound of frequency fs. The farther end of the pipe is closed. The speed of sound in air is v and f0 is the fundamental frequency of the…2021 · Shift 2 · Q40 · Multiple correct
  8. A stationary tuning fork is in resonance with an air column in a pipe. If the tuning fork is moved with a speed of 2 ms−1 in front of the open end of the pipe and parallel to it, the length of the pipe should be changed for the resonance…2020 · Shift 1 · Q39 · Numerical
  9. A train S1, moving with a uniform velocity of 108 km/h, approaches another train S2 standing on a platform. An observer O moves with a uniform velocity of 36 km/h towards S2, as shown in figure. Both the trains are blowing whistles of same… Includes diagram2019 · Shift 1 · Q54 · Numerical
  10. A musical instrument is made using four different metal strings, 1, 2, 3 and 4 with mass per unit length μ, 2 μ, 3 μ and 4 μ respectively. The instrument is played by vibrating the strings by varying the free length in… Includes diagram2019 · Shift 2 · Q51 · MCQ
  11. A musical instrument is made using four different metal strings, 1, 2, 3 and 4 with mass per unit length μ, 2 μ, 3 μ and 4 μ respectively. The instrument is played by vibrating the strings by varying the free length in… Includes diagram2019 · Shift 2 · Q52 · MCQ
  12. Two men are walking along a horizontal straight line in the same direction. The man in front walks at a speed 1.0ms−1 and the man behind walks at a speed 2.0ms−1. A third man in standing at a height 12m above the…2018 · Shift 1 · Q41 · Numerical
  13. In an experiment to measure the speed of sound by a resonating air column, a tuning fork of frequency 500Hz is used. The length of the air column is varied by changing the level of water in the resonance tube. Two successive resonances…2018 · Shift 2 · Q42 · Multiple correct
  14. A block M hangs vertically at the bottom end of a uniform rope of constant mass per unit length. The top end of the rope is attached to fixed rigid support at O. A transverse wave pulse (Pulse 1) of wavelength λ0​ is… Includes diagram2017 · Shift 1 · Q38 · Multiple correct
  15. A stationary source emits sound of frequency f0​=492Hz. The sound is reflected by a large car approaching the source with a speed of 2ms−1. The reflected signal is received by the source and superposed with the original.…2017 · Shift 1 · Q47 · Numerical
  16. Two loudspeakers M and N are located 20m apart and emit sound at frequencies 118 Hz and 121 Hz, respectively. A car in initially at a point P, 1800 m away from the midpoint Q of the line MN and moves towards Q constantly at 60 km/h along…2016 · Shift 1 · Q47 · Multiple correct
  17. Four harmonic waves of equal frequencies and equal intensities I0 have phase angles 0, 3π​,32π​ and π. When they are superposed, the intensity of the resulting wave is nI0. The value of n is2015 · Shift 2 · Q46 · Numerical
  18. One end of a taut string of length 3 m along the x-axis is fixed at x = 0. The speed of the waves in the string is 100 ms − 1. The other end of the string is vibrating in the y-direction so that stationary waves are set up in the string.…2014 · Shift 1 · Q50 · Multiple correct
  19. A student is performing an experiment using a resonance column and a tuning fork of frequency 244 s − 1. He is told that the air in the tube has been replaced by another gas (assume that the column remains filled with the gas). If the…2014 · Shift 1 · Q51 · Multiple correct
  20. A horizontal stretched string, fixed at two ends, is vibrating in its fifth harmonic according to the equation y(x, t) = (0.01 m) sin[(62.8 m − 1)x] cos[(628 s − 1)t] Assuming π = 3.14, the correct statement(s) is(are)2013 · Shift 1 · Q57 · Multiple correct
  21. Two vehicles, each moving with speed u on the same horizontal straight road, are approaching each other. Wind blows along the road with velocity w. One of these vehicles blows a whistle of frequency f1. An observer in the other vehicle…2013 · Shift 2 · Q49 · Multiple correct
  22. A student is performing the experiment of resonance Column. The diameter of the column tube is 4 cm. The frequency of the tuning fork is 512 Hz. The air temperature is 38oC in which the speed of sound is 336 m/s. The zero of the meter…2012 · Shift 2 · Q44 · MCQ
  23. A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall building which reflects the sound waves. The speed of sound in air is 320 m/s. The frequency of the siren heard by the car driver is2011 · Shift 1 · Q54 · MCQ
  24. Column I shows four systems, each of the same length L, for producing standing waves. The lowest possible natural frequency of a system is called its fundamental frequency, whose wavelength is denoted as λ f. Match each system with… Includes diagram2011 · Shift 2 · Q60 · MCQ
  25. A stationary source is emitting sound at a fixed frequency f0, which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is 1.2% of f0. What is the difference in the…2010 · Shift 1 · Q80 · Numerical
  26. When two progressive waves y1​=4sin(2x−6t) and y2​=3sin(2x−6t−2π​) are superimposed, the amplitude of the resultant wave is ​.2010 · Shift 1 · Q84 · Numerical
  27. A hollow pipe of length 0.8 m is closed at one end. At its open end a 0.5 m long uniform string is vibrating in its second harmonic and it resonates with the fundamental frequency of the pipe. If the tension in the wire is 50 N and the…2010 · Shift 2 · Q44 · MCQ
  28. Under the influence of the Coulomb field of charge +Q, a charge − q is moving around it in an elliptical orbit. Find out the correct statement(s):2009 · Shift 2 · Q44 · Multiple correct
  29. A 20 cm long string, having a mass of 1.0 g, is fixed at both the ends. The tension in the string is 0.5 N. The string is set into vibrations using an external vibrator of frequency 100 Hz. find the separation (in cm) between the…2009 · Shift 2 · Q54 · Numerical
  30. A transverse sinusoidal wave moves along a string in the positive x-direction at a speed of 10 cm/s. The wavelength of the waves is 0.5 m and its amplitude is 10 cm. At a particular time t, the snap-shot of the wave is shown in figure. The… Includes diagram2008 · Shift 2 · Q48 · MCQ
  31. A vibrating string of certain length 1 under a tension T resonates with a mode corresponding to the first overtone (third harmonic) of an air column of length 75 cm inside a tube closed at one end. The string also generates 4 beats per…2008 · Shift 2 · Q52 · MCQ
  32. In the experiment to determine the speed of sound using a resonance column,2007 · Shift 2 · Q11 · MCQ
  33. Two trains A and B are moving with speeds 20 m/s and 30 m/s respectively in the same direction on the same straight track, with B ahead of A. The engines are at the front ends. The… Includes diagram2007 · Shift 2 · Q22 · MCQ
  34. Two trains A and B are moving with speeds 20 m/s and 30 m/s respectively in the same direction on the same straight track, with B ahead of A. The engines are at the front ends. The… Includes diagram2007 · Shift 2 · Q23 · MCQ
  35. Two trains A and B are moving with speeds 20 m/s and 30 m/s respectively in the same direction on the same straight track, with B ahead of A. The engines are at the front ends. The… Includes diagram2007 · Shift 2 · Q24 · MCQ
  36. Column I describe some situations in which a small object moves. Column II describes some characteristics of these motions. Match the situation in Column I with the characteristics in Column II and indicate your answer by darkening… Includes table2007 · Shift 2 · Q28 · MCQ