91Ó°ÊÓ

Statement-1 : \(\Lambda\) particle executes SIIM with frequency \(f .\) The frequency with which total mechanical energy of particle oscillates is \(2 f\). Statement-2 : Both kinetic as well as potential energy of particle in SIIM oscillate with a frequency \(2 f\).

Statement-1 : When a simple pendulum is made to oscillate on surface of moon, its time period is more as compared to carth. Statement-2 : Gravity is smaller at moon than at earth.

Statement-1: When a source of sound is approaching an observer, the frequency perceived by the observer is greater than the frequency of the sound source. Statement-2: As the sound-source approaches the listener, the wavelength of the sound decreases while its speed relative to the medium remains unchanged.

Three sources of sound produce sound of the same intensity but their frequencies are 400,401 , \(402 \mathrm{~Hz}\), respectively. How many beats are heard per second?

'The first two lengths of an air column, in a resonance column method, were found to be \(32.1 \mathrm{~cm}\) and \(99.2 \mathrm{~cm}\), respectively. Determinc the end correction for the tube. II it is known that velocity of sound in the laboratory is \(332 \mathrm{~m} / \mathrm{s}\), then find the frequency of the vibrating tuning fork.

Two pendulum have time period \(T\) and \(\frac{37}{4}\). They start \(\mathrm{SHM}\) at the same time from two extreme postion at \(t=0 .\) \Lambdafler how much time they will be in same phasc? (a) \(\frac{T}{2}\) (b) \(\frac{3 T}{2}\) (c) \(\frac{5 T}{2}\) (d) \(\frac{5 T}{4}\)

As a wave propagates (a) the wave intensity remains constant for a plane wave. (b) the wave intensity decreases as the inverse of the distance from the source for a spherical wave. (c) the wave intensity decreases as the inverse square of the distance from the source for a spherical wave. (d) total intensity of the spherical wave over the spherical surface centered at the sources remains constant at all the times.