Waves

Waves

These MCQs are intended for checking your Physics subject, Chapter Waves knowledge.

To demonstrate the phenomenon of beats we need

Transverse are generated in two uniform wires A and B by attaching their free ends to a vibrating source of frequency 600 Hz. The diameter of wire A is one-third that of wire B and tension in the wire A is double that in wire B. What is the ratio of velocities of waves of waves in wire A and B?

A siren placed at a railway platform is emitting sound of frequency 5 kHz. A passenger sitting in a moving train A records a frequency of 5.5 kHz while the train approaches the siren. During his return journey in a different train B he records a frequency of 6.0 kHz while approaching the same siren. The ratio of velocity of train B to that of train A is

The equation of wave traveling along string is y = 3 cos p (100t – x) in C.G.S. unit then wavelength is

An observer is moving towards a stationary source of frequency 250 Hz with a velocity of 40 m/s. If the velocity of sound is 330 m/s, the apparent frequency heard by the observer will be

The frequency of the note produced by plucking a given string increases as

When a compression is incident on rigid wall it is reflected as

Four wires of identical lengths, diameters and material and stretched on a sonometer box. The ratio of their tension is 1 : 4 : 9 : 16. the ratio of their fundamental frequencies is

Energy is to be carried from one place to another. Which one of the following cannot be used?

A resonating column of air contains

String is in fundamental mode of vibration then velocity is directly proportional to _______

To demonstrate the phenomenon of beats we need

A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m/s. The frequency heard by the observer in Hz is

The extension in a string, obeying Hookes law is X. The speed of sound in the stretched string is V. If the extension in the string is increased to 1.5 X, the speed of sound will be

Energy is not carried by

A resonance air column of length 40 cm resonates with a tuning fork of frequency 450 Hz. Ignoring end correction, the velocity of sound in air will be

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