NCERT Solutions for Chapter: Waves, Exercise 1: MCQ-I

Speed of sound wave in air

Change in temperature of the medium changes

With propagation of longitudinal waves through a medium, the quantity transmitted is

Which of the following statements are true for wave motion?

A sound wave is passing through air column in the form of compression and rarefaction. In consecutive compressions and rarefactions,

Equation of a plane progressive wave is given by $y=0.6\sin 2\pi \left[t+\frac{\pi }{2}\right]$ . On reflection from a denser medium its amplitude becomes $2/3$ of the amplitude of the incident wave. The equation of the reflected wave is

A string of mass $2.5 kg$ is under a tension of $200$ $\mathrm{N}$. The length of the stretched string is $20.0 \mathrm{m}$. If the transverse jerk is struck at one end of the string, the disturbance will reach the other end in

A train whistling at constant frequency is moving towards a station at a constant speed $V$. The train goes past a stationary observer on the station. The frequency $n$' of the sound as heard by the observer is plotted as a function of time $\left(t\right)$ Figure. Identify the expected curve.