A point source of sound is located somewhere along the x-axis. Experiments show that the same wave front simultaneously reaches listeners at x=-8 m and `x=+2.0 m` A third listener is positioned along the positive y-axis What is her y-coordinate (in m) if the same wave front reaches her at the same instant as it does the first two listeners?

An electron beam projected along positive x-axis experiences a force, due to a magnetic field along positive y-axis. What is the direction of the magnetic field?

Figure shows four isotropic point sources of sound that are uniformly spaced on an x axis. The sources emit sound at the same wavelength lamda and same amplitudes s_m and they emit in phase. A point P is shown on the x axis. Assume that as the sound waves travel to P, the decrease in their amplitude is negligible. What multiple of s_m is the amplitude of the net wave at P if distance d in the figure is (a) lamda//4 (b) lamda//2 and (c ) lamda ?

Two sound speakers are driver in phase by an audio amplifier at frequency 600 H_(Z) . The speed of sound is 340 m//s . The speakers are on the y - axis, one at y = + 1.0 m and the other at y = - 1.0 m . A listener begins at y = 0 and walks along a line parallel to the y - axis at a very large distance x away. (a) At what angle theta (between the line from the origin to the listener at the x - axis) will she first hear a minimum sound intensity? (b) At what angle will she first hear a maximum (afer theta = o^(@) ) sound intensity? (c ) How many maxima can she possible hear if she keeps walking in the same direction?

Two sound speakers are driver in phase by an audio amplifier at frequency 600 H_(Z) . The speed of sound is 340 m//s . The speakers are on the y - axis, one at y = + 1.0 m and the other at y = - 1.0 m . A listener begins at y = 0 and walks along a line parallel to the y - axis at a very large distance x away. (a) At what angle theta (between the line from the origin to the listener at the x - axis) will she first hear a minimum sound intensity? (b) At what angle will she first hear a maximum (afer theta = o^(@) ) sound intensity? (c ) How many maxima can she possible hear if she keeps walking in the same direction?

Two point charges (Q each are placed at (0,y) and (0-y) A point charge q of the same polarity can move along the x-axis. Then

An electromagnetic wave is propagating along positive z-axis. At any moment, if the direction of the magnetic field at a point be along positive x-axis, what will be the direction of the electric field at that point?

Figure shows a source of sound moving along the X-axis at a speed of 22 m s^-1 continuously emitting a sound of frequency 2.0 kHz which travels in air at a speed of 330 in s^-1 . A listener Q stands on the Y-axis at a distance of 330 m from the origin. At t = 0, the source crosses the origin P. (a) When does the sound emitted from the source at P reach the listener Q 9 (b) What will be the frequency heard by the listener at. this instant 9 (c) Where will the source be at this instant ? .

Figure shows a source of sound moving along the X-axis at a speed of 22 m s^-1 continuously emitting a sound of frequency 2.0 kHz which travels in air at a speed of 330 in s^-1 . A listener Q stands on the Y-axis at a distance of 330 m from the origin. At t = 0, the source crosses the origin P. (a) When does the sound emitted from the source at P reach the listener Q 9 (b) What will be the frequency heard by the listener at. this instant 9 (c) Where will the source be at this instant ? .

A plane sound wave propagates along the x axis . The damping coefficient of the wave is gamma=0.0230 m^(-1) . At the point x=0 the loudness level is L=60 dB . Find : (a) the loudness level at a point with coordinate x=50 m , (b) the coordinate x of the point at which the sound is not heard any more.