Two periodic waves of intensities I₁ and I₂ pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities will be:

Velocity of sound waves in air is 330 m/s. For a particular sound wave in air, path difference of 40 cm is equivalent to phase difference of 1.6 π. The frequency of this wave is:

The wave described by

        y = 0.25 sin (10πx - 2πt),

where x and y are in metre and t in second, is a wave travelling with :

A pointer source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distance of 2m and 3m respectively from the source. The ratio of the intensities of the waves at P and Q is:

The time of reverberation of a room A is one second. What will be the time (in second) of reverberation of a room, having all the dimensions double of those of room A?

The frequency of sinusoidal wave, 0.40 cos (2000t + 0.80) would be:

Equations of two progressive waves are given by y1 = a sin (ωt + ø₂). If amplitude and time period of resultant wave are same as that of both the waves, then (ø₁ - ø₂) is:

A standing wave is represented by y = a sin (100t) cos(0.01)x, where y and a are in millimetre, t in second and x is in metre. Velocity of wave is:

A wave of amplitude a = 0.2m, velocity v= 360 m/s and wavelength 60 m is travelling along positive x axis, then the correct expression for the wave is:

A wave enters to water from air. In air frequency, wavelength, intensity and velocity are n₁, λ₁, l₁ and v₁ respectively. In water the corresponding quantities are n₂, λ₂, l₁and v₂ respectively, then: