28/03/2020Superposition of Waves(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Superposition of Waves(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. The plane wave is described by the equationy=3cos(x/4-10t-π/2),Where c is in meters and t in seconds. The maximum velocity of the particles of the medium due to this is?3/4 m/s40m/s3π/2 m/s30m/s2. The diagram shows a standing wave on a string. The standing wave has three nodes N1, N2 and N3.Which statement is correct?Points equidistant from N2 vibrate with the same frequency and in phase.All points on the string vibrate with the same amplitude.All points on the string vibrate in phase.Points equidistant from N2 vibrate with the same frequency and the same amplitude.3. The waves produced by a motor boat sailing in water are __________TransverseStationaryLongitudinal and transverseLongitudinal4. A double-slit interference of green-coloured light was set up as shown and interference fringes are formed on the screen.Which change would increase the distance between adjacent fringes?Reduce the width of each slit.Use orange-coloured light.Move the double-slit closer to the screen.Use a double-slit where the slits are further apart.5. The diagram shows a string with with ends P and T fixed. The string is made to vibrate transversely so that P, R and T are the only points on the string which are nodesThe vibrations of the two points Q and S, shown on the string, havethe same amplitude and differ in phase by 90°the same amplitude and are in phasethe same amplitude and differ in phase by 180°different amplitudes and are in phase6. Microwaves have wavelength of about10 cm40 cm20 cm30 cm7. If two waves are in phase and have the same amplitude then resultant wave hasthrice of amplitude of single wavesame amplitude as single wavetwice of amplitude of single wavehalf of amplitude of single wave8. Two transverse waves overlap. Crests overlap with crests. Troughs overlap with troughs. The waves areIn-synchronicityIn-phaseOut-of-phaseOut-of-synchronicity9. A suspension bridge is to be built across a valley where it is known that the wind can gust at 5 second interval. It is estimated that speed of transverse waves along the span of the bridge would be 400 m/s. The danger of resonant motion in the bridge at its fundamental frequency would be the greatest if the span had a length of80 m1000 m2000 m400 m10. For listening radio in cars, external radio aerials are used becauseradio waves cannot pass through windowradio waves require a medium to propagateradio waves have longer wavelengthradio waves have shorter wavelength11. For destructive interference, the path difference iseven whole number of wavelengthodd number of half wavelengthswhole number of wavelengthseven number of half wavelengths12. Two waves with phase difference 180° have resultant of amplitudezerosame as the single wavedoubles the single waveone13. A taunt wire is clamped at two points 1.0m apart. It plucked near one end. Which are the three longest wavelength present on the vibrating wire?2.0 m, 1.0 m and 0.67 m1.0 m, 0.67 m and 0.50 m1.0 m, 0.50 m and 0,25 m2.0 m, 1.0 m and 0.50 m14. The equation of wave is given byy=10sin(2πt/30+α)If the displacement is 5cm at t=0, then the total phase at t=7.5s will be ______π/2rad2π/5radπ/3rad2π/3rad15. When two waves meet up, their displacementsad upcancel outsubtract downdestruct each other16. A diffraction grating with N lines per metre is used to deflect light of various wavelengths λ. The diagram shows a relation between the deflection angles of θ for different values of λ in the nth order interference pattern.What is the gradient of the graph?Nn1/NmN/nn/N17. Which of the following is always true for a stationary wave?No energy is transferred from one end of the wave to the other.All particles vibrate in simple harmonic motion with the same frequency as the waveThe particles in the wave oscillate perpendicularly to the direction of wave travelAll particles have the same amplitude.18. A wave is diffracted as it passes through an opening in a barrier.The amount of diffraction that the wave undergoes depends on both theamplitude of the incident wave and the size of the openingamplitude and frequency of the incident wave.wavelength and speed of the incident wave.wavelength of the incident wave and the size of the opening.19. If equation of a sound wave isy=0.0015sin(62.8x+314t)Then its wavelength will be ____0.1unit0.2units2unit0.3unit20. The superposition of two waves createsHigher frequenciesCompressionsInterferenceLight21. With diffraction grating, the angles aresmallgreaterzeroclose to zero22. Visible of light has a wavelength of5 e-7 m4 e4 m3 e8 m6 e3 m23. Splitting of white light in to constituent colors is calledreflectiondispersiondiffractionrefraction24. Which is different from others by units?Loudness of soundMechanical equivalentPoisson’s ratioPhase difference25. A double-slit interference experiment is set up as shown.Fringes are formed on the screen which is 40.0 cm away. The distance between the slits is 9.0 cmapart. The microwave source has a wavelength of 2.0 cm and intensity of I.What is the resultant intensity at X?zerol2l4l26 out of 25Time is Up!
