![]() ![]() (iii) The given wave motion is a combination of longitudinal and transverse waves. (ii) The wave motion is longitudinal, because the molecules of the liquid vibrate to and fro about their mean position along the direction of propagation of the wave. (i) Wave motion is transverse, because the vibration of particles (Kinks) of the spring are at right angles to the direction of wave propagation. (v) Ultrasonic waves in air produced by a vibrating quartz crystal. ![]() (iv) Light waves travelling from sun to the earth. (iii) Waves produced by motor boat sailing in water. (ii) Waves produced in a cylinder containing a liquid by moving its piston back and forth. State in each case, if the wave motion is transverse, Longitudinal or a combination of both (i) Motion of a kink in a long coil spring produced by displacing one end of spring sideways. ![]() Q.11 Given below are some examples of wave motion. No, there is no Doppler’s effect, when the source or observer moves perpendicular to the direction of propagation of sound. Q.10 Will be Doppler effect, when the directions of motion of the source or observer is perpendicular to the direction of propagation of sound ? Ans. Q.9 What physical quantity changes when a source of sound moves and the listener is stationary ? Ans. The notes produced by an instrument of sound other than the fundamental note are called overtones. The frequency of the note emitted gets increased. Q.7 the violin is taken to a hot room, how will the pitch of the note produced be affected? Ans. Because there is no material medium in the space between the planets, through which sound may Q.6 Why explosions on the other planets can not be heard on the earth? Ans. Q.5 What are those two important characteristics which a material medium must have for the propagation of mechanical waves? Ans. Q.4 When sound waves travel from air to water, does the frequency of wave changes? The wavelength ? The speed? Ans. The graph will be a straight line parallel to pressure axis, as speed of sound is independent of the pressure of gas. Q.3 What will be the nature of graph between the pressure of a gas and the speed of sound waves passing through the gas? Ans. This is so because sound travels 16 times faster in iron than in air. Q.2 Explain why it is possible to detect the approaching of a distant train by placing the ear very close to railway line? Ans. ![]() Longitudinal wave is either zero or $\pi$. Angle between particle velocity and wave velocityįor transverse wave is $\pi / 2$ and that in case of What is the angle between particle velocity and wave velocity in ( 1) Transverse wave ( 2) Longitudinal wave? Ans. You will get here all the important questions for class 11 Physics chapter wise CBSE.Ĭlick Here for Detailed Notes of any chapter. This question bank is designed by NCERT keeping in mind and the questions are updated with respect to upcoming Board exams. These important questions will play significant role in clearing concepts of Physics. Download or View 11th Physics important questions for exam point of view. Get important questions of Wave for Board exams. ![]()
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