28/03/2020 Superposition 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?30m/s40m/s3π/2 m/s3/4 m/s2. Visible of light has a wavelength of3 e8 m5 e-7 m4 e4 m6 e3 m3. Which is different from others by units?Loudness of soundMechanical equivalentPhase differencePoisson’s ratio4. Principle of superposition can be applied toall of the aboveEM wavesradio wavessound waves5. A string is stretched under constant tension between fixed points X and Y. The solid lie in the diagram shows a standing (stationary) wave at an instant of greatest displacement. The broken line shows the other extreme displacement.Which one of the following statements is correct?At the moment shown, the energy of the standing wave has both kinetic energy and potential energyThe distance between P and Q is one wavelengthA short time later, the string at R will be displacedThe string at P' and Q' will next move in opposite directions to one another other6. With diffraction grating, the angles areclose to zerozerogreatersmall7. 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?Use a double-slit where the slits are further apart.Move the double-slit closer to the screen.Use orange-coloured light.Reduce the width of each slit.8. If equation of a sound wave isy=0.0015sin(62.8x+314t)Then its wavelength will be ____0.3unit0.2units0.1unit2unit9. For listening radio in cars, external radio aerials are used becauseradio waves have longer wavelengthradio waves cannot pass through windowradio waves require a medium to propagateradio waves have shorter wavelength10. If two waves are in phase and have the same amplitude then resultant wave hassame amplitude as single wavetwice of amplitude of single wavehalf of amplitude of single wavethrice of amplitude of single wave11. 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/3radπ/2rad2π/5rad2π/3rad12. Two waves with phase difference 180° have resultant of amplitudedoubles the single waveonesame as the single wavezero13. Fringes are referred to asnormal pointsmaximaminimanodes14. 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 of400 m2000 m1000 m80 m15. When two waves meet up, their displacementscancel outad upsubtract downdestruct each other16. Splitting of white light in to constituent colors is calledrefractiondiffractionreflectiondispersion17. 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?NnN/nn/N1/Nm18. For a wave propagating in a medium, identify the property that is independent of the others.All these depend on each otherFrequencyWavelengthsVelocity19. A loudspeaker at position S emits sound of a single frequency. The sound travels to Leo who is at position L, both through a straight path and after reflection from a wall as shown.As Leo walks directly towards the wall, the sound alternates between loud and soft. Which of the following changes would result in an increase in the distance between loud and soft sounds?Moving the loudspeaker closer to the wall.Increasing the loudness of the sound emitted by the loudspeaker.Moving the loudspeaker towards L.Increasing the frequency emitted by the loudspeaker.20. 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?zero2l4ll21. Constructive interference happens when two waves arein phaseout of phasezero amplitudein front22. 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?1.0 m, 0.67 m and 0.50 m2.0 m, 1.0 m and 0.50 m1.0 m, 0.50 m and 0,25 m2.0 m, 1.0 m and 0.67 m23. A wire is stretched over two supports, Q and R, a distance 4x apart. Three light pieces of paper rest on the wireWhen the wire is made to vibrate at one particular frequency, the middle piece of paper stays on, but the others fall off the wire.The wavelength of the vibration produced on the wire?2x4x8x3x24. From double slit experiment, the quantities to be measured areslit-to-screen distanceslit separationall of the abovefringe separation25. Two transverse waves overlap. Crests overlap with troughs. Troughs overlap with crests. The waves areIn-synchronicityOut-of-synchronicityOut-of-phaseIn-phase26 out of 25Time is Up!
